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21320310000 = 243541123532
BaseRepresentation
bin10011110110110010…
…100001110011110000
32001000211220222002010
4103312302201303300
5322130444410000
613443332122520
71353223434123
oct236662416360
961024828063
1021320310000
119050839510
124170166440
13201a0a4162
1410637b23ba
1584bb1dd50
hex4f6ca1cf0

21320310000 has 600 divisors, whose sum is σ = 79852139136. Its totient is φ = 4850560000.

The previous prime is 21320309981. The next prime is 21320310017. The reversal of 21320310000 is 1302312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (600).

It is a super-2 number, since 2×213203100002 (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 an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 402269974 + ... + 402270026.

Almost surely, 221320310000 is an apocalyptic number.

21320310000 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 21320310000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39926069568).

21320310000 is an abundant number, since it is smaller than the sum of its proper divisors (58531829136).

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

21320310000 is a wasteful number, since it uses less digits than its factorization.

21320310000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 97 counting only the distinct ones).

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

Adding to 21320310000 its reverse (1302312), we get a palindrome (21321612312).

The spelling of 21320310000 in words is "twenty-one billion, three hundred twenty million, three hundred ten thousand".