18367820856 has 96 divisors (see below), whose sum is σ = 62021232000. Its totient is φ = 4770861120.

The previous prime is 18367820843. The next prime is 18367820893. The reversal of 18367820856 is 65802876381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1651006 + ... + 1662093.

It is an arithmetic number, because the mean of its divisors is an integer number (646054500).

Almost surely, 2^18367820856 is an apocalyptic number.

It is an amenable number.

18367820856 is an abundant number, since it is smaller than the sum of its proper divisors (43653411144).

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

18367820856 is a wasteful number, since it uses less digits than its factorization.

18367820856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3313129 (or 3313122 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 18367820856 in words is "eighteen billion, three hundred sixty-seven million, eight hundred twenty thousand, eight hundred fifty-six".