18455338680 has 64 divisors (see below), whose sum is σ = 55452621600. Its totient is φ = 4913725440.

The previous prime is 18455338633. The next prime is 18455338691. The reversal of 18455338680 is 8683355481.

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 15 ways as a sum of consecutive naturals, for example, 43045 + ... + 196884.

Almost surely, 2^18455338680 is an apocalyptic number.

18455338680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18455338680 is an abundant number, since it is smaller than the sum of its proper divisors (36997282920).

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

18455338680 is a wasteful number, since it uses less digits than its factorization.

18455338680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240584 (or 240580 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 51.

The spelling of 18455338680 in words is "eighteen billion, four hundred fifty-five million, three hundred thirty-eight thousand, six hundred eighty".