21507460625630 has 24 divisors (see below), whose sum is σ = 45033988984488. Its totient is φ = 7373986500048.

The previous prime is 21507460625597. The next prime is 21507460625641. The reversal of 21507460625630 is 3652606470512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21946387904 + ... + 21946388883.

It is an arithmetic number, because the mean of its divisors is an integer number (1876416207687).

Almost surely, 2^{21507460625630} is an apocalyptic number.

21507460625630 is an abundant number, since it is smaller than the sum of its proper divisors (23526528358858).

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

21507460625630 is a wasteful number, since it uses less digits than its factorization.

21507460625630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43892776808 (or 43892776801 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 47.

The spelling of 21507460625630 in words is "twenty-one trillion, five hundred seven billion, four hundred sixty million, six hundred twenty-five thousand, six hundred thirty".