21230606944 has 24 divisors (see below), whose sum is σ = 44256450168. Its totient is φ = 9990873600.

The previous prime is 21230606923. The next prime is 21230606983. The reversal of 21230606944 is 44960603212.

It is a happy number.

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, 19512882 + ... + 19513969.

It is an arithmetic number, because the mean of its divisors is an integer number (1844018757).

Almost surely, 2^21230606944 is an apocalyptic number.

It is an amenable number.

21230606944 is an abundant number, since it is smaller than the sum of its proper divisors (23025843224).

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

21230606944 is a wasteful number, since it uses less digits than its factorization.

21230606944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39026878 (or 39026870 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 21230606944 in words is "twenty-one billion, two hundred thirty million, six hundred six thousand, nine hundred forty-four".