21364025232 has 120 divisors (see below), whose sum is σ = 60775922592. Its totient is φ = 6461987840.

The previous prime is 21364025231. The next prime is 21364025297. The reversal of 21364025232 is 23252046312.

It is a super-2 number, since 2×21364025232² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21364025232.

It is not an unprimeable number, because it can be changed into a prime (21364025231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3441043 + ... + 3447245.

Almost surely, 2^21364025232 is an apocalyptic number.

21364025232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21364025232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30387961296).

21364025232 is an abundant number, since it is smaller than the sum of its proper divisors (39411897360).

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

21364025232 is a wasteful number, since it uses less digits than its factorization.

21364025232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6829 (or 6812 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The spelling of 21364025232 in words is "twenty-one billion, three hundred sixty-four million, twenty-five thousand, two hundred thirty-two".