20504540115 has 24 divisors (see below), whose sum is σ = 35886271200. Its totient is φ = 10829579904.

The previous prime is 20504540113. The next prime is 20504540129. The reversal of 20504540115 is 51104540502.

20504540115 is a `hidden beast` number, since 2 + 0 + 5 + 0 + 4 + 540 + 115 = 666.

It is not a de Polignac number, because 20504540115 - 2¹ = 20504540113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20504540113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2207290 + ... + 2216559.

It is an arithmetic number, because the mean of its divisors is an integer number (1495261300).

Almost surely, 2^20504540115 is an apocalyptic number.

20504540115 is a deficient number, since it is larger than the sum of its proper divisors (15381731085).

20504540115 is a wasteful number, since it uses less digits than its factorization.

20504540115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4423963 (or 4423960 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 20504540115 in words is "twenty billion, five hundred four million, five hundred forty thousand, one hundred fifteen".