20405118200859 has 36 divisors (see below), whose sum is σ = 34286676778224. Its totient is φ = 11659888733472.

The previous prime is 20405118200809. The next prime is 20405118200867. The reversal of 20405118200859 is 95800281150402.

20405118200859 is a `hidden beast` number, since 2 + 0 + 4 + 0 + 511 + 82 + 0 + 0 + 8 + 59 = 666.

It is not a de Polignac number, because 20405118200859 - 2¹² = 20405118196763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20405118200809) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 31718869 + ... + 32355785.

It is an arithmetic number, because the mean of its divisors is an integer number (952407688284).

Almost surely, 2^{20405118200859} is an apocalyptic number.

20405118200859 is a deficient number, since it is larger than the sum of its proper divisors (13881558577365).

20405118200859 is a wasteful number, since it uses less digits than its factorization.

20405118200859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709584 (or 709574 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The spelling of 20405118200859 in words is "twenty trillion, four hundred five billion, one hundred eighteen million, two hundred thousand, eight hundred fifty-nine".