18009882 has 36 divisors (see below), whose sum is σ = 42896490. Its totient is φ = 5456880.

The previous prime is 18009881. The next prime is 18009889. The reversal of 18009882 is 28890081.

It can be written as a sum of positive squares in only one way, i.e., 11553201 + 6456681 = 3399^2 + 2541^2 .

It is not an unprimeable number, because it can be changed into a prime (18009881) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1957 + ... + 6312.

Almost surely, 2^18009882 is an apocalyptic number.

18009882 is an abundant number, since it is smaller than the sum of its proper divisors (24886608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18009882 is a wasteful number, since it uses less digits than its factorization.

18009882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8299 (or 8285 counting only the distinct ones).

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

The square root of 18009882 is about 4243.8051321897. The cubic root of 18009882 is about 262.1220902145.

The spelling of 18009882 in words is "eighteen million, nine thousand, eight hundred eighty-two".