21130330232 has 32 divisors (see below), whose sum is σ = 43666726320. Its totient is φ = 9505674240.

The previous prime is 21130330229. The next prime is 21130330237. The reversal of 21130330232 is 23203303112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130330237) 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, 1229183 + ... + 1246254.

Almost surely, 2^21130330232 is an apocalyptic number.

21130330232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21130330232 is an abundant number, since it is smaller than the sum of its proper divisors (22536396088).

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

21130330232 is a wasteful number, since it uses less digits than its factorization.

21130330232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2475551 (or 2475547 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21130330232 its reverse (23203303112), we get a palindrome (44333633344).

The spelling of 21130330232 in words is "twenty-one billion, one hundred thirty million, three hundred thirty thousand, two hundred thirty-two".