20405118200858 has 32 divisors (see below), whose sum is σ = 31321767149568. Its totient is φ = 9967344937200.

The previous prime is 20405118200809. The next prime is 20405118200867. The reversal of 20405118200858 is 85800281150402.

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, 13927991 + ... + 15323157.

It is an arithmetic number, because the mean of its divisors is an integer number (978805223424).

Almost surely, 2^{20405118200858} is an apocalyptic number.

20405118200858 is a deficient number, since it is larger than the sum of its proper divisors (10916648948710).

20405118200858 is a wasteful number, since it uses less digits than its factorization.

20405118200858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396178.

The product of its (nonzero) digits is 204800, while the sum is 44.

The spelling of 20405118200858 in words is "twenty trillion, four hundred five billion, one hundred eighteen million, two hundred thousand, eight hundred fifty-eight".