18513305901 has 6 divisors (see below), whose sum is σ = 26741441870. Its totient is φ = 12342203928.

The previous prime is 18513305891. The next prime is 18513305929. The reversal of 18513305901 is 10950331581.

18513305901 is a `hidden beast` number, since 18 + 51 + 3 + 3 + 0 + 590 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12695430276 + 5817875625 = 112674^2 + 76275^2 .

It is not a de Polignac number, because 18513305901 - 2⁵ = 18513305869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18513305401) 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, 1028516986 + ... + 1028517003.

Almost surely, 2^18513305901 is an apocalyptic number.

It is an amenable number.

18513305901 is a deficient number, since it is larger than the sum of its proper divisors (8228135969).

18513305901 is a wasteful number, since it uses less digits than its factorization.

18513305901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057033995 (or 2057033992 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The spelling of 18513305901 in words is "eighteen billion, five hundred thirteen million, three hundred five thousand, nine hundred one".