21160737232 has 20 divisors (see below), whose sum is σ = 41298194916. Its totient is φ = 10503138560.

The previous prime is 21160737187. The next prime is 21160737239. The reversal of 21160737232 is 23273706112.

It can be written as a sum of positive squares in 2 ways, for example, as 5574712896 + 15586024336 = 74664^2 + 124844^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21160737239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4824619 + ... + 4829002.

Almost surely, 2^21160737232 is an apocalyptic number.

It is an amenable number.

21160737232 is a deficient number, since it is larger than the sum of its proper divisors (20137457684).

21160737232 is a wasteful number, since it uses less digits than its factorization.

21160737232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9653766 (or 9653760 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The spelling of 21160737232 in words is "twenty-one billion, one hundred sixty million, seven hundred thirty-seven thousand, two hundred thirty-two".