18163332 has 48 divisors (see below), whose sum is σ = 51374400. Its totient is φ = 5503680.

The previous prime is 18163331. The next prime is 18163339. The reversal of 18163332 is 23336181.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 18163296 and 18163305.

It is not an unprimeable number, because it can be changed into a prime (18163331) 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, 6457 + ... + 8832.

It is an arithmetic number, because the mean of its divisors is an integer number (1070300).

Almost surely, 2^18163332 is an apocalyptic number.

18163332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18163332 is an abundant number, since it is smaller than the sum of its proper divisors (33211068).

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

18163332 is a wasteful number, since it uses less digits than its factorization.

18163332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15313 (or 15305 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 18163332 is about 4261.8460788724. The cubic root of 18163332 is about 262.8644407349.

The spelling of 18163332 in words is "eighteen million, one hundred sixty-three thousand, three hundred thirty-two".