18859868 has 24 divisors (see below), whose sum is σ = 35092512. Its totient is φ = 8838144.

The previous prime is 18859861. The next prime is 18859871. The reversal of 18859868 is 86895881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18859861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22505 + ... + 23327.

It is an arithmetic number, because the mean of its divisors is an integer number (1462188).

Almost surely, 2^18859868 is an apocalyptic number.

It is an amenable number.

18859868 is a deficient number, since it is larger than the sum of its proper divisors (16232644).

18859868 is a wasteful number, since it uses less digits than its factorization.

18859868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181 (or 1179 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 53.

The square root of 18859868 is about 4342.7949525622. The cubic root of 18859868 is about 266.1825306057.

The spelling of 18859868 in words is "eighteen million, eight hundred fifty-nine thousand, eight hundred sixty-eight".