20774779179 has 32 divisors (see below), whose sum is σ = 34746630144. Its totient is φ = 10725864480.

The previous prime is 20774779111. The next prime is 20774779237. The reversal of 20774779179 is 97197747702.

It is not a de Polignac number, because 20774779179 - 2¹⁷ = 20774648107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20774779079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 238219 + ... + 313524.

It is an arithmetic number, because the mean of its divisors is an integer number (1085832192).

Almost surely, 2^20774779179 is an apocalyptic number.

20774779179 is a deficient number, since it is larger than the sum of its proper divisors (13971850965).

20774779179 is a wasteful number, since it uses less digits than its factorization.

20774779179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551927.

The product of its (nonzero) digits is 10890936, while the sum is 60.

The spelling of 20774779179 in words is "twenty billion, seven hundred seventy-four million, seven hundred seventy-nine thousand, one hundred seventy-nine".