18731796953 has 16 divisors (see below), whose sum is σ = 20151612864. Its totient is φ = 17347883520.

The previous prime is 18731796913. The next prime is 18731796989. The reversal of 18731796953 is 35969713781.

It is a cyclic number.

It is not a de Polignac number, because 18731796953 - 2¹⁴ = 18731780569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18731796892 and 18731796901.

It is not an unprimeable number, because it can be changed into a prime (18731796913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1097501 + ... + 1114437.

It is an arithmetic number, because the mean of its divisors is an integer number (1259475804).

Almost surely, 2^18731796953 is an apocalyptic number.

It is an amenable number.

18731796953 is a deficient number, since it is larger than the sum of its proper divisors (1419815911).

18731796953 is a wasteful number, since it uses less digits than its factorization.

18731796953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17992.

The product of its digits is 8573040, while the sum is 59.

The spelling of 18731796953 in words is "eighteen billion, seven hundred thirty-one million, seven hundred ninety-six thousand, nine hundred fifty-three".