18681360601 has 4 divisors (see below), whose sum is σ = 18917833600. Its totient is φ = 18444887604.

The previous prime is 18681360521. The next prime is 18681360613. The reversal of 18681360601 is 10606318681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18681360601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18681360641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118236381 + ... + 118236538.

It is an arithmetic number, because the mean of its divisors is an integer number (4729458400).

Almost surely, 2^18681360601 is an apocalyptic number.

It is an amenable number.

18681360601 is a deficient number, since it is larger than the sum of its proper divisors (236472999).

18681360601 is an equidigital number, since it uses as much as digits as its factorization.

18681360601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236472998.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 18681360601 in words is "eighteen billion, six hundred eighty-one million, three hundred sixty thousand, six hundred one".