18233320 has 32 divisors (see below), whose sum is σ = 46886400. Its totient is φ = 6251328.

The previous prime is 18233291. The next prime is 18233329. The reversal of 18233320 is 2333281.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18233291 and 18233300.

It is not an unprimeable number, because it can be changed into a prime (18233329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32280 + ... + 32839.

It is an arithmetic number, because the mean of its divisors is an integer number (1465200).

Almost surely, 2^18233320 is an apocalyptic number.

18233320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18233320 is an abundant number, since it is smaller than the sum of its proper divisors (28653080).

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

18233320 is a wasteful number, since it uses less digits than its factorization.

18233320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65137 (or 65133 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 18233320 is about 4270.0491800447. The cubic root of 18233320 is about 263.2016361536.

The spelling of 18233320 in words is "eighteen million, two hundred thirty-three thousand, three hundred twenty".