21703574172 has 48 divisors (see below), whose sum is σ = 57987401472. Its totient is φ = 6189106560.

The previous prime is 21703574159. The next prime is 21703574177. The reversal of 21703574172 is 27147530712.

It is a self number, because there is not a number n which added to its sum of digits gives 21703574172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21703574177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204198 + ... + 291725.

It is an arithmetic number, because the mean of its divisors is an integer number (1208070864).

Almost surely, 2^21703574172 is an apocalyptic number.

It is an amenable number.

21703574172 is an abundant number, since it is smaller than the sum of its proper divisors (36283827300).

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

21703574172 is a wasteful number, since it uses less digits than its factorization.

21703574172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496458 (or 496456 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 39.

The spelling of 21703574172 in words is "twenty-one billion, seven hundred three million, five hundred seventy-four thousand, one hundred seventy-two".