21533902324 has 48 divisors (see below), whose sum is σ = 42582254400. Its totient is φ = 9438508800.

The previous prime is 21533902307. The next prime is 21533902427. The reversal of 21533902324 is 42320933512.

It is a self number, because there is not a number n which added to its sum of digits gives 21533902324.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1024432 + ... + 1045240.

It is an arithmetic number, because the mean of its divisors is an integer number (887130300).

Almost surely, 2^21533902324 is an apocalyptic number.

It is an amenable number.

21533902324 is a deficient number, since it is larger than the sum of its proper divisors (21048352076).

21533902324 is a wasteful number, since it uses less digits than its factorization.

21533902324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21664 (or 21662 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 21533902324 in words is "twenty-one billion, five hundred thirty-three million, nine hundred two thousand, three hundred twenty-four".