18423332 has 12 divisors (see below), whose sum is σ = 32302620. Its totient is φ = 9194016.

The previous prime is 18423319. The next prime is 18423337. The reversal of 18423332 is 23332481.

It can be written as a sum of positive squares in 2 ways, for example, as 9339136 + 9084196 = 3056^2 + 3014^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18423337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1907 + ... + 6362.

It is an arithmetic number, because the mean of its divisors is an integer number (2691885).

Almost surely, 2^18423332 is an apocalyptic number.

It is an amenable number.

18423332 is a deficient number, since it is larger than the sum of its proper divisors (13879288).

18423332 is a wasteful number, since it uses less digits than its factorization.

18423332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8830 (or 8828 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 18423332 is about 4292.2409065662. The cubic root of 18423332 is about 264.1127655697.

The spelling of 18423332 in words is "eighteen million, four hundred twenty-three thousand, three hundred thirty-two".