20011531160808 has 144 divisors (see below), whose sum is σ = 59840043768960. Its totient is φ = 6036906490560.

The previous prime is 20011531160783. The next prime is 20011531160813. The reversal of 20011531160808 is 80806113511002.

20011531160808 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 15 + 31 + 1 + 608 + 0 + 8 = 666.

It is a super-2 number, since 2×20011531160808² (a number of 27 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3207466 + ... + 7093017.

Almost surely, 2^{20011531160808} is an apocalyptic number.

It is an amenable number.

20011531160808 is an abundant number, since it is smaller than the sum of its proper divisors (39828512608152).

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

20011531160808 is a wasteful number, since it uses less digits than its factorization.

20011531160808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10300740 (or 10300722 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The spelling of 20011531160808 in words is "twenty trillion, eleven billion, five hundred thirty-one million, one hundred sixty thousand, eight hundred eight".