18975889 has 8 divisors (see below), whose sum is σ = 20664000. Its totient is φ = 17356752.

The previous prime is 18975881. The next prime is 18975967. The reversal of 18975889 is 98857981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18975889 - 2³ = 18975881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18975881) 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, 16669 + ... + 17770.

It is an arithmetic number, because the mean of its divisors is an integer number (2583000).

Almost surely, 2^18975889 is an apocalyptic number.

18975889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18975889 is a deficient number, since it is larger than the sum of its proper divisors (1688111).

18975889 is a wasteful number, since it uses less digits than its factorization.

18975889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34487.

The product of its digits is 1451520, while the sum is 55.

The square root of 18975889 is about 4356.1323441787. The cubic root of 18975889 is about 266.7272437033.

The spelling of 18975889 in words is "eighteen million, nine hundred seventy-five thousand, eight hundred eighty-nine".