20013721611372 has 36 divisors (see below), whose sum is σ = 50603925209656. Its totient is φ = 6669435991680.

The previous prime is 20013721611283. The next prime is 20013721611391. The reversal of 20013721611372 is 27311612731002.

20013721611372 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 3 + 7 + 2 + 1 + 611 + 37 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75054454 + ... + 75320637.

Almost surely, 2^{20013721611372} is an apocalyptic number.

It is an amenable number.

20013721611372 is an abundant number, since it is smaller than the sum of its proper divisors (30590203598284).

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

20013721611372 is a wasteful number, since it uses less digits than its factorization.

20013721611372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150378798 (or 150378793 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The spelling of 20013721611372 in words is "twenty trillion, thirteen billion, seven hundred twenty-one million, six hundred eleven thousand, three hundred seventy-two".