18617842432 has 72 divisors (see below), whose sum is σ = 43338932000. Its totient is φ = 7979037696.

The previous prime is 18617842381. The next prime is 18617842457. The reversal of 18617842432 is 23424871681.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18207 + ... + 193822.

Almost surely, 2^18617842432 is an apocalyptic number.

It is an amenable number.

18617842432 is an abundant number, since it is smaller than the sum of its proper divisors (24721089568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18617842432 is an frugal number, since it uses more digits than its factorization.

18617842432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212066 (or 212038 counting only the distinct ones).

The product of its digits is 516096, while the sum is 46.

The spelling of 18617842432 in words is "eighteen billion, six hundred seventeen million, eight hundred forty-two thousand, four hundred thirty-two".