18238146 has 16 divisors (see below), whose sum is σ = 37075008. Its totient is φ = 5979600.

The previous prime is 18238133. The next prime is 18238159. The reversal of 18238146 is 64183281.

It is an interprime number because it is at equal distance from previous prime (18238133) and next prime (18238159).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24550 + ... + 25281.

It is an arithmetic number, because the mean of its divisors is an integer number (2317188).

Almost surely, 2^18238146 is an apocalyptic number.

18238146 is an abundant number, since it is smaller than the sum of its proper divisors (18836862).

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

18238146 is a wasteful number, since it uses less digits than its factorization.

18238146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49897.

The product of its digits is 9216, while the sum is 33.

The square root of 18238146 is about 4270.6142415348. The cubic root of 18238146 is about 263.2248555315.

The spelling of 18238146 in words is "eighteen million, two hundred thirty-eight thousand, one hundred forty-six".