18836019 has 6 divisors (see below), whose sum is σ = 27207596. Its totient is φ = 12557340.

The previous prime is 18836009. The next prime is 18836033. The reversal of 18836019 is 91063881.

It is not a de Polignac number, because 18836019 - 2⁵ = 18835987 is a prime.

It is a super-2 number, since 2×18836019² = 709591223536722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18836009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1046437 + ... + 1046454.

Almost surely, 2^18836019 is an apocalyptic number.

18836019 is a deficient number, since it is larger than the sum of its proper divisors (8371577).

18836019 is a wasteful number, since it uses less digits than its factorization.

18836019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092897 (or 2092894 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 18836019 is about 4340.0482716210. The cubic root of 18836019 is about 266.0702840638.

The spelling of 18836019 in words is "eighteen million, eight hundred thirty-six thousand, nineteen".