18880089 has 4 divisors (see below), whose sum is σ = 25173456. Its totient is φ = 12586724.

The previous prime is 18880087. The next prime is 18880097. The reversal of 18880089 is 98008881.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18880089 - 2¹ = 18880087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18880089.

It is not an unprimeable number, because it can be changed into a prime (18880087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3146679 + ... + 3146684.

It is an arithmetic number, because the mean of its divisors is an integer number (6293364).

Almost surely, 2^18880089 is an apocalyptic number.

It is an amenable number.

18880089 is a deficient number, since it is larger than the sum of its proper divisors (6293367).

18880089 is an equidigital number, since it uses as much as digits as its factorization.

18880089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6293366.

The product of its (nonzero) digits is 36864, while the sum is 42.

The square root of 18880089 is about 4345.1224378606. The cubic root of 18880089 is about 266.2776276738.

The spelling of 18880089 in words is "eighteen million, eight hundred eighty thousand, eighty-nine".