18802089 has 12 divisors (see below), whose sum is σ = 28035072. Its totient is φ = 12130200.

The previous prime is 18802081. The next prime is 18802123. The reversal of 18802089 is 98020881.

It is not a de Polignac number, because 18802089 - 2³ = 18802081 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18802081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33417 + ... + 33974.

It is an arithmetic number, because the mean of its divisors is an integer number (2336256).

Almost surely, 2^18802089 is an apocalyptic number.

It is an amenable number.

18802089 is a deficient number, since it is larger than the sum of its proper divisors (9232983).

18802089 is a wasteful number, since it uses less digits than its factorization.

18802089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67428 (or 67425 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 18802089 is about 4336.1375670059. The cubic root of 18802089 is about 265.9104273756.

It can be divided in two parts, 1880 and 2089, that added together give a square (3969 = 63²).

The spelling of 18802089 in words is "eighteen million, eight hundred two thousand, eighty-nine".