18338132 has 6 divisors (see below), whose sum is σ = 32091738. Its totient is φ = 9169064.

The previous prime is 18338129. The next prime is 18338137. The reversal of 18338132 is 23183381.

It can be written as a sum of positive squares in only one way, i.e., 12645136 + 5692996 = 3556^2 + 2386^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18338095 and 18338104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18338137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2292263 + ... + 2292270.

It is an arithmetic number, because the mean of its divisors is an integer number (5348623).

Almost surely, 2^18338132 is an apocalyptic number.

It is an amenable number.

18338132 is a deficient number, since it is larger than the sum of its proper divisors (13753606).

18338132 is a wasteful number, since it uses less digits than its factorization.

18338132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4584537 (or 4584535 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 18338132 is about 4282.3045197650. The cubic root of 18338132 is about 263.7050002966.

The spelling of 18338132 in words is "eighteen million, three hundred thirty-eight thousand, one hundred thirty-two".