18875889 has 16 divisors (see below), whose sum is σ = 28142400. Its totient is φ = 12503808.

The previous prime is 18875851. The next prime is 18875903. The reversal of 18875889 is 98857881.

It is not a de Polignac number, because 18875889 - 2⁷ = 18875761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18875819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2257 + ... + 6545.

It is an arithmetic number, because the mean of its divisors is an integer number (1758900).

Almost surely, 2^18875889 is an apocalyptic number.

It is an amenable number.

18875889 is a deficient number, since it is larger than the sum of its proper divisors (9266511).

18875889 is a wasteful number, since it uses less digits than its factorization.

18875889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4461 (or 4455 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 54.

The square root of 18875889 is about 4344.6391104440. The cubic root of 18875889 is about 266.2578811395.

It can be divided in two parts, 1887 and 5889, that added together give a 5-th power (7776 = 6⁵).

The spelling of 18875889 in words is "eighteen million, eight hundred seventy-five thousand, eight hundred eighty-nine".