21650205324 has 48 divisors (see below), whose sum is σ = 55124979840. Its totient is φ = 6558839040.

The previous prime is 21650205323. The next prime is 21650205359. The reversal of 21650205324 is 42350205612.

It is a junction number, because it is equal to n+sod(n) for n = 21650205291 and 21650205300.

It is not an unprimeable number, because it can be changed into a prime (21650205323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 496932 + ... + 538740.

It is an arithmetic number, because the mean of its divisors is an integer number (1148437080).

Almost surely, 2^21650205324 is an apocalyptic number.

It is an amenable number.

21650205324 is an abundant number, since it is smaller than the sum of its proper divisors (33474774516).

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

21650205324 is a wasteful number, since it uses less digits than its factorization.

21650205324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45750 (or 45748 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 21650205324 in words is "twenty-one billion, six hundred fifty million, two hundred five thousand, three hundred twenty-four".