20013777731712 has 64 divisors (see below), whose sum is σ = 53162063163360. Its totient is φ = 6671200757760.

The previous prime is 20013777731677. The next prime is 20013777731741. The reversal of 20013777731712 is 21713777731002.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×20013777731712² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84270412 + ... + 84507572.

Almost surely, 2^{20013777731712} is an apocalyptic number.

It is an amenable number.

20013777731712 is an abundant number, since it is smaller than the sum of its proper divisors (33148285431648).

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

20013777731712 is a wasteful number, since it uses less digits than its factorization.

20013777731712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456941 (or 456929 counting only the distinct ones).

The product of its (nonzero) digits is 605052, while the sum is 48.

The spelling of 20013777731712 in words is "twenty trillion, thirteen billion, seven hundred seventy-seven million, seven hundred thirty-one thousand, seven hundred twelve".