21725502162 has 32 divisors (see below), whose sum is σ = 53478160512. Its totient is φ = 5729802624.

The previous prime is 21725502133. The next prime is 21725502167. The reversal of 21725502162 is 26120552712.

It is not an unprimeable number, because it can be changed into a prime (21725502167) 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, 19894603 + ... + 19895694.

It is an arithmetic number, because the mean of its divisors is an integer number (1671192516).

Almost surely, 2^21725502162 is an apocalyptic number.

21725502162 is an abundant number, since it is smaller than the sum of its proper divisors (31752658350).

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

21725502162 is a wasteful number, since it uses less digits than its factorization.

21725502162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39790322.

The product of its (nonzero) digits is 16800, while the sum is 33.

It can be divided in two parts, 2172550 and 2162, that added together give a palindrome (2174712).

The spelling of 21725502162 in words is "twenty-one billion, seven hundred twenty-five million, five hundred two thousand, one hundred sixty-two".