21630622252 has 24 divisors (see below), whose sum is σ = 38149881392. Its totient is φ = 10730880000.

The previous prime is 21630622213. The next prime is 21630622267. The reversal of 21630622252 is 25222603612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364252 + ... + 419452.

Almost surely, 2^21630622252 is an apocalyptic number.

It is an amenable number.

21630622252 is a deficient number, since it is larger than the sum of its proper divisors (16519259140).

21630622252 is a wasteful number, since it uses less digits than its factorization.

21630622252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55969 (or 55967 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 21630622252 in words is "twenty-one billion, six hundred thirty million, six hundred twenty-two thousand, two hundred fifty-two".