20524574172 has 12 divisors (see below), whose sum is σ = 47890673096. Its totient is φ = 6841524720.

The previous prime is 20524574167. The next prime is 20524574207. The reversal of 20524574172 is 27147542502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 20524574172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 855190579 + ... + 855190602.

Almost surely, 2^20524574172 is an apocalyptic number.

It is an amenable number.

20524574172 is an abundant number, since it is smaller than the sum of its proper divisors (27366098924).

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

20524574172 is a wasteful number, since it uses less digits than its factorization.

20524574172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710381188 (or 1710381186 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 39.

The spelling of 20524574172 in words is "twenty billion, five hundred twenty-four million, five hundred seventy-four thousand, one hundred seventy-two".