18696338 has 4 divisors (see below), whose sum is σ = 28044510. Its totient is φ = 9348168.

The previous prime is 18696313. The next prime is 18696347. The reversal of 18696338 is 83369681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83369681 = 47 ⋅1773823.

It can be written as a sum of positive squares in only one way, i.e., 15816529 + 2879809 = 3977^2 + 1697^2 .

It is a super-2 number, since 2×18696338² = 699106109220488, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4674083 + ... + 4674086.

Almost surely, 2^18696338 is an apocalyptic number.

18696338 is a deficient number, since it is larger than the sum of its proper divisors (9348172).

18696338 is an equidigital number, since it uses as much as digits as its factorization.

18696338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9348171.

The product of its digits is 186624, while the sum is 44.

The square root of 18696338 is about 4323.9262250876. The cubic root of 18696338 is about 265.4109584221.

The spelling of 18696338 in words is "eighteen million, six hundred ninety-six thousand, three hundred thirty-eight".