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21002310000 = 2432547173753
BaseRepresentation
bin10011100011110101…
…011101000101110000
32000012200112220002100
4103203311131011300
5321003042410000
613352012220400
71342312455330
oct234365350560
960180486070
1021002310000
1189a82903a1
1240a176a700
131c99243389
1410334750c0
1582dc56a00
hex4e3d5d170

21002310000 has 1200 divisors, whose sum is σ = 93002779584. Its totient is φ = 4313088000.

The previous prime is 21002309989. The next prime is 21002310011. The reversal of 21002310000 is 1320012.

21002310000 = 9903 + 9913 + ... + 10103.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21002309989) and next prime (21002310011).

It is a tau number, because it is divible by the number of its divisors (1200).

It is a super-2 number, since 2×210023100002 (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 396269974 + ... + 396270026.

Almost surely, 221002310000 is an apocalyptic number.

21002310000 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 21002310000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46501389792).

21002310000 is an abundant number, since it is smaller than the sum of its proper divisors (72000469584).

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

21002310000 is a wasteful number, since it uses less digits than its factorization.

21002310000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 21002310000 its reverse (1320012), we get a palindrome (21003630012).

The spelling of 21002310000 in words is "twenty-one billion, two million, three hundred ten thousand".