20770147986 has 32 divisors (see below), whose sum is σ = 47548062720. Its totient is φ = 5925148176.

The previous prime is 20770147973. The next prime is 20770148033. The reversal of 20770147986 is 68974107702.

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, 354996 + ... + 409343.

It is an arithmetic number, because the mean of its divisors is an integer number (1485876960).

Almost surely, 2^20770147986 is an apocalyptic number.

20770147986 is an abundant number, since it is smaller than the sum of its proper divisors (26777914734).

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

20770147986 is a wasteful number, since it uses less digits than its factorization.

20770147986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764998.

The product of its (nonzero) digits is 1185408, while the sum is 51.

The spelling of 20770147986 in words is "twenty billion, seven hundred seventy million, one hundred forty-seven thousand, nine hundred eighty-six".