21244512230 has 64 divisors (see below), whose sum is σ = 41063464512. Its totient is φ = 7885209600.

The previous prime is 21244512227. The next prime is 21244512271. The reversal of 21244512230 is 3221544212.

It is a self number, because there is not a number n which added to its sum of digits gives 21244512230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4565405 + ... + 4570055.

It is an arithmetic number, because the mean of its divisors is an integer number (641616633).

Almost surely, 2^21244512230 is an apocalyptic number.

21244512230 is a deficient number, since it is larger than the sum of its proper divisors (19818952282).

21244512230 is a wasteful number, since it uses less digits than its factorization.

21244512230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5049.

The product of its (nonzero) digits is 3840, while the sum is 26.

The spelling of 21244512230 in words is "twenty-one billion, two hundred forty-four million, five hundred twelve thousand, two hundred thirty".