21929653250 has 32 divisors (see below), whose sum is σ = 41304242304. Its totient is φ = 8718030000.

The previous prime is 21929653189. The next prime is 21929653259. The reversal of 21929653250 is 5235692912.

It is not an unprimeable number, because it can be changed into a prime (21929653259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228326 + ... + 309825.

It is an arithmetic number, because the mean of its divisors is an integer number (1290757572).

Almost surely, 2^21929653250 is an apocalyptic number.

21929653250 is a deficient number, since it is larger than the sum of its proper divisors (19374589054).

21929653250 is a wasteful number, since it uses less digits than its factorization.

21929653250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538331 (or 538321 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 21929653250 in words is "twenty-one billion, nine hundred twenty-nine million, six hundred fifty-three thousand, two hundred fifty".