18466989 has 8 divisors (see below), whose sum is σ = 24654240. Its totient is φ = 12295536.

The previous prime is 18466969. The next prime is 18467003. The reversal of 18466989 is 98966481.

It is a happy number.

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

It is not a de Polignac number, because 18466989 - 2⁸ = 18466733 is a prime.

It is a super-2 number, since 2×18466989² = 682059365452242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18466969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879 + ... + 6140.

It is an arithmetic number, because the mean of its divisors is an integer number (3081780).

Almost surely, 2^18466989 is an apocalyptic number.

It is an amenable number.

18466989 is a deficient number, since it is larger than the sum of its proper divisors (6187251).

18466989 is an equidigital number, since it uses as much as digits as its factorization.

18466989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7899.

The product of its digits is 746496, while the sum is 51.

The square root of 18466989 is about 4297.3234693237. The cubic root of 18466989 is about 264.3212199958.

The spelling of 18466989 in words is "eighteen million, four hundred sixty-six thousand, nine hundred eighty-nine".