20408500717020 has 144 divisors (see below), whose sum is σ = 68469600894240. Its totient is φ = 4887857115648.

The previous prime is 20408500716931. The next prime is 20408500717067. The reversal of 20408500717020 is 2071700580402.

20408500717020 is a `hidden beast` number, since 20 + 40 + 8 + 500 + 7 + 1 + 70 + 20 = 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 47 ways as a sum of consecutive naturals, for example, 117772630 + ... + 117945789.

Almost surely, 2^{20408500717020} is an apocalyptic number.

20408500717020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20408500717020 is an abundant number, since it is smaller than the sum of its proper divisors (48061100177220).

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

20408500717020 is a wasteful number, since it uses less digits than its factorization.

20408500717020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235718484 (or 235718479 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The spelling of 20408500717020 in words is "twenty trillion, four hundred eight billion, five hundred million, seven hundred seventeen thousand, twenty".