18797998 has 8 divisors (see below), whose sum is σ = 28959192. Its totient is φ = 9144936.

The previous prime is 18797983. The next prime is 18798037. The reversal of 18797998 is 89979781.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126940 + ... + 127087.

It is an arithmetic number, because the mean of its divisors is an integer number (3619899).

Almost surely, 2^18797998 is an apocalyptic number.

18797998 is a deficient number, since it is larger than the sum of its proper divisors (10161194).

18797998 is a wasteful number, since it uses less digits than its factorization.

18797998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254066.

The product of its digits is 2286144, while the sum is 58.

The square root of 18797998 is about 4335.6658081545. The cubic root of 18797998 is about 265.8911401842.

The spelling of 18797998 in words is "eighteen million, seven hundred ninety-seven thousand, nine hundred ninety-eight".