18208953801 has 12 divisors (see below), whose sum is σ = 26318888128. Its totient is φ = 12131425944.

The previous prime is 18208953769. The next prime is 18208953809. The reversal of 18208953801 is 10835980281.

It is a happy number.

18208953801 is a `hidden beast` number, since 18 + 20 + 89 + 538 + 0 + 1 = 666.

It is not a de Polignac number, because 18208953801 - 2⁵ = 18208953769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18208953809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 641725 + ... + 669498.

Almost surely, 2^18208953801 is an apocalyptic number.

It is an amenable number.

18208953801 is a deficient number, since it is larger than the sum of its proper divisors (8109934327).

18208953801 is a wasteful number, since it uses less digits than its factorization.

18208953801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312772 (or 1312769 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 18208953801 in words is "eighteen billion, two hundred eight million, nine hundred fifty-three thousand, eight hundred one".