18221040027 has 12 divisors (see below), whose sum is σ = 26328574584. Its totient is φ = 12143070240.

The previous prime is 18221039987. The next prime is 18221040029. The reversal of 18221040027 is 72004012281.

18221040027 is a `hidden beast` number, since 18 + 221 + 0 + 400 + 27 = 666.

It is not a de Polignac number, because 18221040027 - 2⁷ = 18221039899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18221040029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330474 + ... + 381647.

It is an arithmetic number, because the mean of its divisors is an integer number (2194047882).

Almost surely, 2^18221040027 is an apocalyptic number.

18221040027 is a deficient number, since it is larger than the sum of its proper divisors (8107534557).

18221040027 is a wasteful number, since it uses less digits than its factorization.

18221040027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714970 (or 714967 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The spelling of 18221040027 in words is "eighteen billion, two hundred twenty-one million, forty thousand, twenty-seven".