20013721567413 has 64 divisors (see below), whose sum is σ = 31025048592384. Its totient is φ = 11239914168000.

The previous prime is 20013721567409. The next prime is 20013721567517. The reversal of 20013721567413 is 31476512731002.

It is not a de Polignac number, because 20013721567413 - 2² = 20013721567409 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013721567313) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 886689418 + ... + 886711988.

It is an arithmetic number, because the mean of its divisors is an integer number (484766384256).

Almost surely, 2^{20013721567413} is an apocalyptic number.

It is an amenable number.

20013721567413 is a deficient number, since it is larger than the sum of its proper divisors (11011327024971).

20013721567413 is a wasteful number, since it uses less digits than its factorization.

20013721567413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25286.

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 20013721567413 in words is "twenty trillion, thirteen billion, seven hundred twenty-one million, five hundred sixty-seven thousand, four hundred thirteen".