18920232 has 24 divisors (see below), whose sum is σ = 51242490. Its totient is φ = 6306720.

The previous prime is 18920207. The next prime is 18920233. The reversal of 18920232 is 23202981.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15256836 + 3663396 = 3906^2 + 1914^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 18920196 and 18920205.

It is not an unprimeable number, because it can be changed into a prime (18920233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 131319 + ... + 131462.

Almost surely, 2^18920232 is an apocalyptic number.

18920232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18920232 is an abundant number, since it is smaller than the sum of its proper divisors (32322258).

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

18920232 is a wasteful number, since it uses less digits than its factorization.

18920232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262793 (or 262786 counting only the distinct ones).

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

The square root of 18920232 is about 4349.7393025330. The cubic root of 18920232 is about 266.4662146367.

The spelling of 18920232 in words is "eighteen million, nine hundred twenty thousand, two hundred thirty-two".