20573864320 has 64 divisors (see below), whose sum is σ = 51322883040. Its totient is φ = 7871733760.

The previous prime is 20573864303. The next prime is 20573864357. The reversal of 20573864320 is 2346837502.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684121 + ... + 713560.

Almost surely, 2^20573864320 is an apocalyptic number.

20573864320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20573864320 is an abundant number, since it is smaller than the sum of its proper divisors (30749018720).

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

20573864320 is a wasteful number, since it uses less digits than its factorization.

20573864320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397723 (or 1397711 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 20573864320 in words is "twenty billion, five hundred seventy-three million, eight hundred sixty-four thousand, three hundred twenty".