18868419 has 12 divisors (see below), whose sum is σ = 28857816. Its totient is φ = 11838912.

The previous prime is 18868411. The next prime is 18868433. The reversal of 18868419 is 91486881.

It is not a de Polignac number, because 18868419 - 2³ = 18868411 is a prime.

It is a super-2 number, since 2×18868419² = 712034471119122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18868411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61509 + ... + 61814.

It is an arithmetic number, because the mean of its divisors is an integer number (2404818).

Almost surely, 2^18868419 is an apocalyptic number.

18868419 is a deficient number, since it is larger than the sum of its proper divisors (9989397).

18868419 is a wasteful number, since it uses less digits than its factorization.

18868419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123346 (or 123343 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 18868419 is about 4343.7793452246. The cubic root of 18868419 is about 266.2227532787. Note that the first 3 decimals are identical.

The spelling of 18868419 in words is "eighteen million, eight hundred sixty-eight thousand, four hundred nineteen".