18680032 has 48 divisors (see below), whose sum is σ = 42547680. Its totient is φ = 7907328.

The previous prime is 18680027. The next prime is 18680033. The reversal of 18680032 is 23008681.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18680033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19468 + ... + 20404.

It is an arithmetic number, because the mean of its divisors is an integer number (886410).

Almost surely, 2^18680032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18680032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21273840).

18680032 is an abundant number, since it is smaller than the sum of its proper divisors (23867648).

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

18680032 is an equidigital number, since it uses as much as digits as its factorization.

18680032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043 (or 1035 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 18680032 is about 4322.0402589518. The cubic root of 18680032 is about 265.3337766435. Note that the first 3 decimals are identical.

The spelling of 18680032 in words is "eighteen million, six hundred eighty thousand, thirty-two".