18802989 has 16 divisors (see below), whose sum is σ = 29323200. Its totient is φ = 11875248.

The previous prime is 18802963. The next prime is 18802999. The reversal of 18802989 is 98920881.

It is not a de Polignac number, because 18802989 - 2⁸ = 18802733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18802909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17814 + ... + 18839.

It is an arithmetic number, because the mean of its divisors is an integer number (1832700).

Almost surely, 2^18802989 is an apocalyptic number.

18802989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18802989 is a deficient number, since it is larger than the sum of its proper divisors (10520211).

18802989 is a wasteful number, since it uses less digits than its factorization.

18802989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36681 (or 36675 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 18802989 is about 4336.2413447593. The cubic root of 18802989 is about 265.9146700879.

It can be divided in two parts, 18802 and 989, that added together give a palindrome (19791).

The spelling of 18802989 in words is "eighteen million, eight hundred two thousand, nine hundred eighty-nine".