18838209708992 has 28 divisors (see below), whose sum is σ = 37442463540120. Its totient is φ = 9403888187136.

The previous prime is 18838209708959. The next prime is 18838209709021. The reversal of 18838209708992 is 29980790283881.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237720503 + ... + 237799734.

Almost surely, 2^{18838209708992} is an apocalyptic number.

It is an amenable number.

18838209708992 is a deficient number, since it is larger than the sum of its proper divisors (18604253831128).

18838209708992 is an equidigital number, since it uses as much as digits as its factorization.

18838209708992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475520868 (or 475520858 counting only the distinct ones).

The product of its (nonzero) digits is 250822656, while the sum is 74.

The spelling of 18838209708992 in words is "eighteen trillion, eight hundred thirty-eight billion, two hundred nine million, seven hundred eight thousand, nine hundred ninety-two".