18640932 has 48 divisors (see below), whose sum is σ = 44815680. Its totient is φ = 6028288.

The previous prime is 18640931. The next prime is 18640949. The reversal of 18640932 is 23904681.

It is a junction number, because it is equal to n+sod(n) for n = 18640893 and 18640902.

It is not an unprimeable number, because it can be changed into a prime (18640931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79888 + ... + 80120.

It is an arithmetic number, because the mean of its divisors is an integer number (933660).

Almost surely, 2^18640932 is an apocalyptic number.

18640932 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18640932 is an abundant number, since it is smaller than the sum of its proper divisors (26174748).

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

18640932 is a wasteful number, since it uses less digits than its factorization.

18640932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 18640932 is about 4317.5145628011. The cubic root of 18640932 is about 265.1485200449.

The spelling of 18640932 in words is "eighteen million, six hundred forty thousand, nine hundred thirty-two".