20732531232 has 48 divisors (see below), whose sum is σ = 62197595712. Its totient is φ = 5923580160.

The previous prime is 20732531219. The next prime is 20732531249. The reversal of 20732531232 is 23213523702.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 20732531232.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15425319 + ... + 15426662.

It is an arithmetic number, because the mean of its divisors is an integer number (1295783244).

Almost surely, 2^20732531232 is an apocalyptic number.

It is an amenable number.

20732531232 is an abundant number, since it is smaller than the sum of its proper divisors (41465064480).

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

20732531232 is a wasteful number, since it uses less digits than its factorization.

20732531232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30852001 (or 30851993 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 30.

The spelling of 20732531232 in words is "twenty billion, seven hundred thirty-two million, five hundred thirty-one thousand, two hundred thirty-two".