18675890 has 16 divisors (see below), whose sum is σ = 33710040. Its totient is φ = 7449600.

The previous prime is 18675883. The next prime is 18675907. The reversal of 18675890 is 9857681.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13344409 + 5331481 = 3653^2 + 2309^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1490 + ... + 6290.

Almost surely, 2^18675890 is an apocalyptic number.

18675890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18675890 is a deficient number, since it is larger than the sum of its proper divisors (15034150).

18675890 is a wasteful number, since it uses less digits than its factorization.

18675890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5197.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 18675890 is about 4321.5610605428. The cubic root of 18675890 is about 265.3141640122.

The spelling of 18675890 in words is "eighteen million, six hundred seventy-five thousand, eight hundred ninety".