18949658 has 16 divisors (see below), whose sum is σ = 34984320. Its totient is φ = 7496496.

The previous prime is 18949643. The next prime is 18949663. The reversal of 18949658 is 85694981.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

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, 51878 + ... + 52241.

It is an arithmetic number, because the mean of its divisors is an integer number (2186520).

Almost surely, 2^18949658 is an apocalyptic number.

18949658 is a deficient number, since it is larger than the sum of its proper divisors (16034662).

18949658 is a wasteful number, since it uses less digits than its factorization.

18949658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104141.

The product of its digits is 622080, while the sum is 50.

The square root of 18949658 is about 4353.1204899474. The cubic root of 18949658 is about 266.6042850609.

The spelling of 18949658 in words is "eighteen million, nine hundred forty-nine thousand, six hundred fifty-eight".