18056402 has 24 divisors (see below), whose sum is σ = 33932556. Its totient is φ = 7142688.

The previous prime is 18056399. The next prime is 18056417. The reversal of 18056402 is 20465081.

It can be written as a sum of positive squares in 2 ways, for example, as 18054001 + 2401 = 4249^2 + 49^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5813 + ... + 8360.

Almost surely, 2^18056402 is an apocalyptic number.

18056402 is a deficient number, since it is larger than the sum of its proper divisors (15876154).

18056402 is a wasteful number, since it uses less digits than its factorization.

18056402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14202 (or 14195 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 18056402 is about 4249.2825276745. The cubic root of 18056402 is about 262.3475855954.

The spelling of 18056402 in words is "eighteen million, fifty-six thousand, four hundred two".