20020537020400 has 120 divisors (see below), whose sum is σ = 54973315232640. Its totient is φ = 6863854375680.

The previous prime is 20020537020397. The next prime is 20020537020413. The reversal of 20020537020400 is 402073502002.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

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, 62164587 + ... + 62485813.

It is an arithmetic number, because the mean of its divisors is an integer number (458110960272).

Almost surely, 2^{20020537020400} is an apocalyptic number.

20020537020400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020537020400 is an abundant number, since it is smaller than the sum of its proper divisors (34952778212240).

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

20020537020400 is a wasteful number, since it uses less digits than its factorization.

20020537020400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343511 (or 343500 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The spelling of 20020537020400 in words is "twenty trillion, twenty billion, five hundred thirty-seven million, twenty thousand, four hundred".