18318643201 has 8 divisors (see below), whose sum is σ = 18511416000. Its totient is φ = 18126672720.

The previous prime is 18318643159. The next prime is 18318643207. The reversal of 18318643201 is 10234681381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18318643201 - 2⁷ = 18318643073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18318643207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154621 + ... + 246058.

It is an arithmetic number, because the mean of its divisors is an integer number (2313927000).

Almost surely, 2^18318643201 is an apocalyptic number.

It is an amenable number.

18318643201 is a deficient number, since it is larger than the sum of its proper divisors (192772799).

18318643201 is a wasteful number, since it uses less digits than its factorization.

18318643201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401159.

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 18318643201 in words is "eighteen billion, three hundred eighteen million, six hundred forty-three thousand, two hundred one".