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21031203000 = 2335317873923
BaseRepresentation
bin10011100101100011…
…101011000010111000
32000021200220210211110
4103211203223002320
5321032441444000
613354523400320
71343113163433
oct234543530270
960250823743
1021031203000
118a12625105
1240ab3830a0
131ca221b522
14103723681a
15831562850
hex4e58eb0b8

21031203000 has 128 divisors (see below), whose sum is σ = 65670808320. Its totient is φ = 5603753600.

The previous prime is 21031202989. The next prime is 21031203001. The reversal of 21031203000 is 30213012.

It is a happy number.

It is a super-2 number, since 2×210312030002 (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031203001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5359039 + ... + 5362961.

It is an arithmetic number, because the mean of its divisors is an integer number (513053190).

Almost surely, 221031203000 is an apocalyptic number.

21031203000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21031203000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32835404160).

21031203000 is an abundant number, since it is smaller than the sum of its proper divisors (44639605320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21031203000 is a wasteful number, since it uses less digits than its factorization.

21031203000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5734 (or 5720 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 21031203000 its reverse (30213012), we get a palindrome (21061416012).

The spelling of 21031203000 in words is "twenty-one billion, thirty-one million, two hundred three thousand".

Divisors: 1 2 3 4 5 6 8 10 12 15 20 24 25 30 40 50 60 75 100 120 125 150 200 250 300 375 500 600 750 1000 1500 1787 3000 3574 3923 5361 7148 7846 8935 10722 11769 14296 15692 17870 19615 21444 23538 26805 31384 35740 39230 42888 44675 47076 53610 58845 71480 78460 89350 94152 98075 107220 117690 134025 156920 178700 196150 214440 223375 235380 268050 294225 357400 392300 446750 470760 490375 536100 588450 670125 784600 893500 980750 1072200 1176900 1340250 1471125 1787000 1961500 2353800 2680500 2942250 3923000 5361000 5884500 7010401 11769000 14020802 21031203 28041604 35052005 42062406 56083208 70104010 84124812 105156015 140208020 168249624 175260025 210312030 280416040 350520050 420624060 525780075 701040100 841248120 876300125 1051560150 1402080200 1752600250 2103120300 2628900375 3505200500 4206240600 5257800750 7010401000 10515601500 21031203000