18842033640 has 64 divisors (see below), whose sum is σ = 59851172160. Its totient is φ = 4728980480.

The previous prime is 18842033579. The next prime is 18842033653. The reversal of 18842033640 is 4633024881.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4616106 + ... + 4620185.

It is an arithmetic number, because the mean of its divisors is an integer number (935174565).

Almost surely, 2^18842033640 is an apocalyptic number.

18842033640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18842033640 is an abundant number, since it is smaller than the sum of its proper divisors (41009138520).

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

18842033640 is a wasteful number, since it uses less digits than its factorization.

18842033640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9236322 (or 9236318 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The spelling of 18842033640 in words is "eighteen billion, eight hundred forty-two million, thirty-three thousand, six hundred forty".