20324629728 has 96 divisors (see below), whose sum is σ = 63840218400. Its totient is φ = 6253728768.

The previous prime is 20324629709. The next prime is 20324629733. The reversal of 20324629728 is 82792642302.

It is a tau number, because it is divible by the number of its divisors (96).

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, 893533 + ... + 915996.

It is an arithmetic number, because the mean of its divisors is an integer number (665002275).

Almost surely, 2^20324629728 is an apocalyptic number.

It is an amenable number.

20324629728 is an abundant number, since it is smaller than the sum of its proper divisors (43515588672).

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

20324629728 is a wasteful number, since it uses less digits than its factorization.

20324629728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809561 (or 1809547 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 20324629728 in words is "twenty billion, three hundred twenty-four million, six hundred twenty-nine thousand, seven hundred twenty-eight".