18402426 has 24 divisors (see below), whose sum is σ = 45568224. Its totient is φ = 5257800.

The previous prime is 18402413. The next prime is 18402457. The reversal of 18402426 is 62420481.

It is a self number, because there is not a number n which added to its sum of digits gives 18402426.

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, 72900 + ... + 73151.

It is an arithmetic number, because the mean of its divisors is an integer number (1898676).

Almost surely, 2^18402426 is an apocalyptic number.

18402426 is an abundant number, since it is smaller than the sum of its proper divisors (27165798).

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

18402426 is a wasteful number, since it uses less digits than its factorization.

18402426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146066 (or 146063 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 18402426 is about 4289.8048906681. The cubic root of 18402426 is about 264.0128265118.

The spelling of 18402426 in words is "eighteen million, four hundred two thousand, four hundred twenty-six".