20665089324 has 72 divisors (see below), whose sum is σ = 57033259920. Its totient is φ = 6256905600.

The previous prime is 20665089287. The next prime is 20665089331. The reversal of 20665089324 is 42398056602.

It is a self number, because there is not a number n which added to its sum of digits gives 20665089324.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 465454 + ... + 507914.

It is an arithmetic number, because the mean of its divisors is an integer number (792128610).

Almost surely, 2^20665089324 is an apocalyptic number.

It is an amenable number.

20665089324 is an abundant number, since it is smaller than the sum of its proper divisors (36368170596).

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

20665089324 is a wasteful number, since it uses less digits than its factorization.

20665089324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43711 (or 43706 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 20665089324 in words is "twenty billion, six hundred sixty-five million, eighty-nine thousand, three hundred twenty-four".