18266998 has 8 divisors (see below), whose sum is σ = 28284480. Its totient is φ = 8838840.

The previous prime is 18266981. The next prime is 18267001. The reversal of 18266998 is 89966281.

It is a happy number.

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, 147253 + ... + 147376.

It is an arithmetic number, because the mean of its divisors is an integer number (3535560).

Almost surely, 2^18266998 is an apocalyptic number.

18266998 is a deficient number, since it is larger than the sum of its proper divisors (10017482).

18266998 is a wasteful number, since it uses less digits than its factorization.

18266998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294662.

The product of its digits is 373248, while the sum is 49.

The square root of 18266998 is about 4273.9908750488. The cubic root of 18266998 is about 263.3635860488.

The spelling of 18266998 in words is "eighteen million, two hundred sixty-six thousand, nine hundred ninety-eight".