18418620392 has 16 divisors (see below), whose sum is σ = 34539755460. Its totient is φ = 9208018944.

The previous prime is 18418620391. The next prime is 18418620401. The reversal of 18418620392 is 29302681481.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17962968676 + 455651716 = 134026^2 + 21346^2 .

It is not an unprimeable number, because it can be changed into a prime (18418620391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99383 + ... + 216134.

Almost surely, 2^18418620392 is an apocalyptic number.

It is an amenable number.

18418620392 is a deficient number, since it is larger than the sum of its proper divisors (16121135068).

18418620392 is a wasteful number, since it uses less digits than its factorization.

18418620392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322820 (or 322816 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 18418620392 in words is "eighteen billion, four hundred eighteen million, six hundred twenty thousand, three hundred ninety-two".