21302132232 has 64 divisors (see below), whose sum is σ = 55653396480. Its totient is φ = 6787996992.

The previous prime is 21302132231. The next prime is 21302132233. The reversal of 21302132232 is 23223120312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21302132231) and next prime (21302132233).

It is a super-2 number, since 2×21302132232² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21302132199 and 21302132208.

It is not an unprimeable number, because it can be changed into a prime (21302132231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171088 + ... + 268095.

It is an arithmetic number, because the mean of its divisors is an integer number (869584320).

Almost surely, 2^21302132232 is an apocalyptic number.

It is an amenable number.

21302132232 is an abundant number, since it is smaller than the sum of its proper divisors (34351264248).

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

21302132232 is a wasteful number, since it uses less digits than its factorization.

21302132232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439282 (or 439278 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21302132232 its reverse (23223120312), we get a palindrome (44525252544).

The spelling of 21302132232 in words is "twenty-one billion, three hundred two million, one hundred thirty-two thousand, two hundred thirty-two".