18486220456 has 32 divisors (see below), whose sum is σ = 37823669280. Its totient is φ = 8400395200.

The previous prime is 18486220453. The next prime is 18486220463. The reversal of 18486220456 is 65402268481.

It is not an unprimeable number, because it can be changed into a prime (18486220453) 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, 295011 + ... + 352141.

It is an arithmetic number, because the mean of its divisors is an integer number (1181989665).

Almost surely, 2^18486220456 is an apocalyptic number.

It is an amenable number.

18486220456 is an abundant number, since it is smaller than the sum of its proper divisors (19337448824).

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

18486220456 is a wasteful number, since it uses less digits than its factorization.

18486220456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60825 (or 60821 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 46.

The spelling of 18486220456 in words is "eighteen billion, four hundred eighty-six million, two hundred twenty thousand, four hundred fifty-six".