18796989 has 8 divisors (see below), whose sum is σ = 25406272. Its totient is φ = 12359520.

The previous prime is 18796979. The next prime is 18796993. The reversal of 18796989 is 98969781.

18796989 = 471² + 472² + ... + 543².

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

It is not a de Polignac number, because 18796989 - 2⁸ = 18796733 is a prime.

It is a super-2 number, since 2×18796989² = 706653590932242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18796949) 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, 42697 + ... + 43134.

It is an arithmetic number, because the mean of its divisors is an integer number (3175784).

Almost surely, 2^18796989 is an apocalyptic number.

It is an amenable number.

18796989 is a deficient number, since it is larger than the sum of its proper divisors (6609283).

18796989 is an equidigital number, since it uses as much as digits as its factorization.

18796989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85907.

The product of its digits is 1959552, while the sum is 57.

The square root of 18796989 is about 4335.5494461487. The cubic root of 18796989 is about 265.8863827811.

The spelling of 18796989 in words is "eighteen million, seven hundred ninety-six thousand, nine hundred eighty-nine".