18309852 has 36 divisors (see below), whose sum is σ = 50491896. Its totient is φ = 5548320.

The previous prime is 18309847. The next prime is 18309853. The reversal of 18309852 is 25890381.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18309853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22723 + ... + 23514.

Almost surely, 2^18309852 is an apocalyptic number.

18309852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18309852 is an abundant number, since it is smaller than the sum of its proper divisors (32182044).

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

18309852 is a wasteful number, since it uses less digits than its factorization.

18309852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46258 (or 46253 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 18309852 is about 4279.0012853469. The cubic root of 18309852 is about 263.5693737191.

The spelling of 18309852 in words is "eighteen million, three hundred nine thousand, eight hundred fifty-two".