20320674400 has 72 divisors (see below), whose sum is σ = 53423861904. Its totient is φ = 7503014400.

The previous prime is 20320674397. The next prime is 20320674421. The reversal of 20320674400 is 447602302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 966556 + ... + 987355.

It is an arithmetic number, because the mean of its divisors is an integer number (741998082).

Almost surely, 2^20320674400 is an apocalyptic number.

20320674400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20320674400 is an abundant number, since it is smaller than the sum of its proper divisors (33103187504).

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

20320674400 is a wasteful number, since it uses less digits than its factorization.

20320674400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953944 (or 1953931 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The spelling of 20320674400 in words is "twenty billion, three hundred twenty million, six hundred seventy-four thousand, four hundred".