20057318515 has 16 divisors (see below), whose sum is σ = 25941910176. Its totient is φ = 14799168000.

The previous prime is 20057318507. The next prime is 20057318527. The reversal of 20057318515 is 51581375002.

It is a happy number.

It is not a de Polignac number, because 20057318515 - 2³ = 20057318507 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50401 + ... + 206530.

It is an arithmetic number, because the mean of its divisors is an integer number (1621369386).

Almost surely, 2^20057318515 is an apocalyptic number.

20057318515 is a deficient number, since it is larger than the sum of its proper divisors (5884591661).

20057318515 is a wasteful number, since it uses less digits than its factorization.

20057318515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258150.

The product of its (nonzero) digits is 42000, while the sum is 37.

The spelling of 20057318515 in words is "twenty billion, fifty-seven million, three hundred eighteen thousand, five hundred fifteen".