20406168958 has 64 divisors (see below), whose sum is σ = 36358616448. Its totient is φ = 8408494080.

The previous prime is 20406168949. The next prime is 20406168973. The reversal of 20406168958 is 85986160402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12777016 + ... + 12778612.

It is an arithmetic number, because the mean of its divisors is an integer number (568103382).

Almost surely, 2^20406168958 is an apocalyptic number.

20406168958 is a deficient number, since it is larger than the sum of its proper divisors (15952447490).

20406168958 is a wasteful number, since it uses less digits than its factorization.

20406168958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 20406168958 in words is "twenty billion, four hundred six million, one hundred sixty-eight thousand, nine hundred fifty-eight".