21150664532 has 24 divisors (see below), whose sum is σ = 37127274912. Its totient is φ = 10542924000.

The previous prime is 21150664519. The next prime is 21150664537. The reversal of 21150664532 is 23546605112.

It is a super-2 number, since 2×21150664532² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21150664492 and 21150664501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150664537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1797107 + ... + 1808837.

It is an arithmetic number, because the mean of its divisors is an integer number (1546969788).

Almost surely, 2^21150664532 is an apocalyptic number.

It is an amenable number.

21150664532 is a deficient number, since it is larger than the sum of its proper divisors (15976610380).

21150664532 is a wasteful number, since it uses less digits than its factorization.

21150664532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13079 (or 13077 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 21150664532 in words is "twenty-one billion, one hundred fifty million, six hundred sixty-four thousand, five hundred thirty-two".