20720406627864 has 96 divisors (see below), whose sum is σ = 59073092083200. Its totient is φ = 6543091638720.

The previous prime is 20720406627853. The next prime is 20720406627931. The reversal of 20720406627864 is 46872660402702.

20720406627864 is a `hidden beast` number, since 2 + 0 + 7 + 2 + 0 + 4 + 0 + 6 + 627 + 8 + 6 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20720406627864.

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, 49838529 + ... + 50252559.

It is an arithmetic number, because the mean of its divisors is an integer number (615344709200).

Almost surely, 2^{20720406627864} is an apocalyptic number.

20720406627864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20720406627864 is an abundant number, since it is smaller than the sum of its proper divisors (38352685455336).

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

20720406627864 is a wasteful number, since it uses less digits than its factorization.

20720406627864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450645 (or 450638 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 54.

The spelling of 20720406627864 in words is "twenty trillion, seven hundred twenty billion, four hundred six million, six hundred twenty-seven thousand, eight hundred sixty-four".