18038356 has 12 divisors (see below), whose sum is σ = 36076768. Its totient is φ = 7730712.

The previous prime is 18038329. The next prime is 18038357. The reversal of 18038356 is 65383081.

It is a happy number.

18038356 is an admirable number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18038357) 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, 322086 + ... + 322141.

Almost surely, 2^18038356 is an apocalyptic number.

It is an amenable number.

18038356 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18038356 is a wasteful number, since it uses less digits than its factorization.

18038356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644238 (or 644236 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 18038356 is about 4247.1585795682. The cubic root of 18038356 is about 262.2601576459.

The spelling of 18038356 in words is "eighteen million, thirty-eight thousand, three hundred fifty-six".