21332320232 has 32 divisors (see below), whose sum is σ = 41747892480. Its totient is φ = 10199787840.

The previous prime is 21332320231. The next prime is 21332320237. The reversal of 21332320232 is 23202323312.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 21332320198 and 21332320207.

It is not an unprimeable number, because it can be changed into a prime (21332320231) 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, 832118 + ... + 857370.

It is an arithmetic number, because the mean of its divisors is an integer number (1304621640).

Almost surely, 2^21332320232 is an apocalyptic number.

It is an amenable number.

21332320232 is a deficient number, since it is larger than the sum of its proper divisors (20415572248).

21332320232 is a wasteful number, since it uses less digits than its factorization.

21332320232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29873 (or 29869 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21332320232 its reverse (23202323312), we get a palindrome (44534643544).

The spelling of 21332320232 in words is "twenty-one billion, three hundred thirty-two million, three hundred twenty thousand, two hundred thirty-two".