18268078056 has 32 divisors (see below), whose sum is σ = 46183348800. Its totient is φ = 6020938880.

The previous prime is 18268078033. The next prime is 18268078057. The reversal of 18268078056 is 65087086281.

It is not an unprimeable number, because it can be changed into a prime (18268078057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4274100 + ... + 4278371.

It is an arithmetic number, because the mean of its divisors is an integer number (1443229650).

Almost surely, 2^18268078056 is an apocalyptic number.

It is an amenable number.

18268078056 is an abundant number, since it is smaller than the sum of its proper divisors (27915270744).

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

18268078056 is a wasteful number, since it uses less digits than its factorization.

18268078056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8552569 (or 8552565 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 18268078056 in words is "eighteen billion, two hundred sixty-eight million, seventy-eight thousand, fifty-six".