18166032 has 100 divisors (see below), whose sum is σ = 53474256. Its totient is φ = 5952960.

The previous prime is 18166019. The next prime is 18166037. The reversal of 18166032 is 23066181.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 18165987 and 18166005.

It is not an unprimeable number, because it can be changed into a prime (18166037) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 138607 + ... + 138737.

Almost surely, 2^18166032 is an apocalyptic number.

18166032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18166032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26737128).

18166032 is an abundant number, since it is smaller than the sum of its proper divisors (35308224).

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

18166032 is a wasteful number, since it uses less digits than its factorization.

18166032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 18166032 is about 4262.1628312396. The cubic root of 18166032 is about 262.8774651225.

The spelling of 18166032 in words is "eighteen million, one hundred sixty-six thousand, thirty-two".