18146138 has 8 divisors (see below), whose sum is σ = 27386688. Its totient is φ = 9017244.

The previous prime is 18146101. The next prime is 18146147. The reversal of 18146138 is 83164181.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27506 + ... + 28157.

It is an arithmetic number, because the mean of its divisors is an integer number (3423336).

Almost surely, 2^18146138 is an apocalyptic number.

18146138 is a deficient number, since it is larger than the sum of its proper divisors (9240550).

18146138 is a wasteful number, since it uses less digits than its factorization.

18146138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55828.

The product of its digits is 4608, while the sum is 32.

The square root of 18146138 is about 4259.8284002997. The cubic root of 18146138 is about 262.7814692092.

The spelling of 18146138 in words is "eighteen million, one hundred forty-six thousand, one hundred thirty-eight".