20880786774 has 16 divisors (see below), whose sum is σ = 42066404208. Its totient is φ = 6909457152.

The previous prime is 20880786767. The next prime is 20880786779. The reversal of 20880786774 is 47768708802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20880786779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12700387 + ... + 12702030.

It is an arithmetic number, because the mean of its divisors is an integer number (2629150263).

Almost surely, 2^20880786774 is an apocalyptic number.

20880786774 is an abundant number, since it is smaller than the sum of its proper divisors (21185617434).

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

20880786774 is a wasteful number, since it uses less digits than its factorization.

20880786774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25402559.

The product of its (nonzero) digits is 8429568, while the sum is 57.

The spelling of 20880786774 in words is "twenty billion, eight hundred eighty million, seven hundred eighty-six thousand, seven hundred seventy-four".