18874490 has 32 divisors (see below), whose sum is σ = 35769600. Its totient is φ = 7156864.

The previous prime is 18874483. The next prime is 18874501. The reversal of 18874490 is 9447881.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31211 + ... + 31809.

It is an arithmetic number, because the mean of its divisors is an integer number (1117800).

Almost surely, 2^18874490 is an apocalyptic number.

18874490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18874490 is a deficient number, since it is larger than the sum of its proper divisors (16895110).

18874490 is a wasteful number, since it uses less digits than its factorization.

18874490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 18874490 is about 4344.4781044448. The cubic root of 18874490 is about 266.2513030126.

The spelling of 18874490 in words is "eighteen million, eight hundred seventy-four thousand, four hundred ninety".