20408086620 has 48 divisors (see below), whose sum is σ = 63491826720. Its totient is φ = 5442156288.

The previous prime is 20408086609. The next prime is 20408086649. The reversal of 20408086620 is 2668080402.

20408086620 is a `hidden beast` number, since 20 + 4 + 0 + 8 + 0 + 8 + 6 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 18895837 + ... + 18896916.

It is an arithmetic number, because the mean of its divisors is an integer number (1322746390).

Almost surely, 2^20408086620 is an apocalyptic number.

20408086620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20408086620 is an abundant number, since it is smaller than the sum of its proper divisors (43083740100).

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

20408086620 is a wasteful number, since it uses less digits than its factorization.

20408086620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37792771 (or 37792763 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 20408086620 in words is "twenty billion, four hundred eight million, eighty-six thousand, six hundred twenty".