20013777054472 has 8 divisors (see below), whose sum is σ = 37525831977150. Its totient is φ = 10006888527232.

The previous prime is 20013777054419. The next prime is 20013777054493. The reversal of 20013777054472 is 27445077731002.

It can be written as a sum of positive squares in only one way, i.e., 10185965870116 + 9827811184356 = 3191546^2 + 3134934^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20013777054472² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250861065897 + ... + 1250861065912.

Almost surely, 2^{20013777054472} is an apocalyptic number.

It is an amenable number.

20013777054472 is a deficient number, since it is larger than the sum of its proper divisors (17512054922678).

20013777054472 is a wasteful number, since it uses less digits than its factorization.

20013777054472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501722131815 (or 2501722131811 counting only the distinct ones).

The product of its (nonzero) digits is 2304960, while the sum is 49.

The spelling of 20013777054472 in words is "twenty trillion, thirteen billion, seven hundred seventy-seven million, fifty-four thousand, four hundred seventy-two".