18840998 has 16 divisors (see below), whose sum is σ = 32644944. Its totient is φ = 8060160.

The previous prime is 18840967. The next prime is 18841019. The reversal of 18840998 is 89904881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24815 + ... + 25562.

It is an arithmetic number, because the mean of its divisors is an integer number (2040309).

Almost surely, 2^18840998 is an apocalyptic number.

18840998 is a deficient number, since it is larger than the sum of its proper divisors (13803946).

18840998 is a wasteful number, since it uses less digits than its factorization.

18840998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50407.

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 18840998 is about 4340.6218448513. The cubic root of 18840998 is about 266.0937258048.

The spelling of 18840998 in words is "eighteen million, eight hundred forty thousand, nine hundred ninety-eight".