18146238 has 16 divisors (see below), whose sum is σ = 39591936. Its totient is φ = 5498840.

The previous prime is 18146203. The next prime is 18146239. The reversal of 18146238 is 83264181.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 18146199 and 18146208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18146239) 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, 137406 + ... + 137537.

It is an arithmetic number, because the mean of its divisors is an integer number (2474496).

Almost surely, 2^18146238 is an apocalyptic number.

18146238 is an abundant number, since it is smaller than the sum of its proper divisors (21445698).

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

18146238 is a wasteful number, since it uses less digits than its factorization.

18146238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274959.

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

The square root of 18146238 is about 4259.8401378456. The cubic root of 18146238 is about 262.7819519216.

The spelling of 18146238 in words is "eighteen million, one hundred forty-six thousand, two hundred thirty-eight".