20013777704464 has 20 divisors (see below), whose sum is σ = 38777564126160. Its totient is φ = 10006664381600.

The previous prime is 20013777704363. The next prime is 20013777704471. The reversal of 20013777704464 is 46440777731002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13292674 + ... + 14721505.

It is an arithmetic number, because the mean of its divisors is an integer number (1938878206308).

Almost surely, 2^{20013777704464} is an apocalyptic number.

It is an amenable number.

20013777704464 is a deficient number, since it is larger than the sum of its proper divisors (18763786421696).

20013777704464 is a wasteful number, since it uses less digits than its factorization.

20013777704464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28058838 (or 28058832 counting only the distinct ones).

The product of its (nonzero) digits is 5531904, while the sum is 52.

The spelling of 20013777704464 in words is "twenty trillion, thirteen billion, seven hundred seventy-seven million, seven hundred four thousand, four hundred sixty-four".