20015372720313 has 6 divisors (see below), whose sum is σ = 28911093929354. Its totient is φ = 13343581813536.

The previous prime is 20015372720309. The next prime is 20015372720323. The reversal of 20015372720313 is 31302727351002.

20015372720313 is a `hidden beast` number, since 20 + 0 + 1 + 53 + 7 + 272 + 0 + 313 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12359703515769 + 7655669204544 = 3515637^2 + 2766888^2 .

It is not a de Polignac number, because 20015372720313 - 2² = 20015372720309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20015372720323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111965151120 + ... + 1111965151137.

Almost surely, 2^{20015372720313} is an apocalyptic number.

It is an amenable number.

20015372720313 is a deficient number, since it is larger than the sum of its proper divisors (8895721209041).

20015372720313 is a wasteful number, since it uses less digits than its factorization.

20015372720313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223930302263 (or 2223930302260 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The spelling of 20015372720313 in words is "twenty trillion, fifteen billion, three hundred seventy-two million, seven hundred twenty thousand, three hundred thirteen".