21704501120 has 192 divisors, whose sum is σ = 56421565200. Its totient is φ = 7978156032.

The previous prime is 21704501087. The next prime is 21704501177. The reversal of 21704501120 is 2110540712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7951916 + ... + 7954644.

Almost surely, 2^21704501120 is an apocalyptic number.

21704501120 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 21704501120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28210782600).

21704501120 is an abundant number, since it is smaller than the sum of its proper divisors (34717064080).

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

21704501120 is a wasteful number, since it uses less digits than its factorization.

21704501120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825 (or 2796 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The spelling of 21704501120 in words is "twenty-one billion, seven hundred four million, five hundred one thousand, one hundred twenty".