20656513532 has 24 divisors (see below), whose sum is σ = 37775294592. Its totient is φ = 9864874800.

The previous prime is 20656513477. The next prime is 20656513597. The reversal of 20656513532 is 23531565602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98894 + ... + 226037.

It is an arithmetic number, because the mean of its divisors is an integer number (1573970608).

Almost surely, 2^20656513532 is an apocalyptic number.

It is an amenable number.

20656513532 is a deficient number, since it is larger than the sum of its proper divisors (17118781060).

20656513532 is a wasteful number, since it uses less digits than its factorization.

20656513532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325649 (or 325647 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 38.

The spelling of 20656513532 in words is "twenty billion, six hundred fifty-six million, five hundred thirteen thousand, five hundred thirty-two".