18820732 has 12 divisors (see below), whose sum is σ = 37641520. Its totient is φ = 8066016.

The previous prime is 18820729. The next prime is 18820771. The reversal of 18820732 is 23702881.

18820732 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 18820694 and 18820703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336057 + ... + 336112.

Almost surely, 2^18820732 is an apocalyptic number.

It is an amenable number.

18820732 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18820732 is a wasteful number, since it uses less digits than its factorization.

18820732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672180 (or 672178 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 18820732 is about 4338.2867586180. The cubic root of 18820732 is about 265.9982851756.

The spelling of 18820732 in words is "eighteen million, eight hundred twenty thousand, seven hundred thirty-two".