21130233204 has 12 divisors (see below), whose sum is σ = 49303877504. Its totient is φ = 7043411064.

The previous prime is 21130233191. The next prime is 21130233227. The reversal of 21130233204 is 40233203112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 880426372 + ... + 880426395.

Almost surely, 2^21130233204 is an apocalyptic number.

It is an amenable number.

21130233204 is an abundant number, since it is smaller than the sum of its proper divisors (28173644300).

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

21130233204 is a wasteful number, since it uses less digits than its factorization.

21130233204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760852774 (or 1760852772 counting only the distinct ones).

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

Adding to 21130233204 its reverse (40233203112), we get a palindrome (61363436316).

The spelling of 21130233204 in words is "twenty-one billion, one hundred thirty million, two hundred thirty-three thousand, two hundred four".