18650138 has 16 divisors (see below), whose sum is σ = 30554496. Its totient is φ = 8485680.

The previous prime is 18650129. The next prime is 18650147. The reversal of 18650138 is 83105681.

It is an interprime number because it is at equal distance from previous prime (18650129) and next prime (18650147).

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, 3206 + ... + 6897.

It is an arithmetic number, because the mean of its divisors is an integer number (1909656).

Almost surely, 2^18650138 is an apocalyptic number.

18650138 is a deficient number, since it is larger than the sum of its proper divisors (11904358).

18650138 is a wasteful number, since it uses less digits than its factorization.

18650138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10189.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 18650138 is about 4318.5805538394. The cubic root of 18650138 is about 265.1921615601.

The spelling of 18650138 in words is "eighteen million, six hundred fifty thousand, one hundred thirty-eight".