18208038 has 16 divisors (see below), whose sum is σ = 36458496. Its totient is φ = 6062280.

The previous prime is 18208013. The next prime is 18208051. The reversal of 18208038 is 83080281.

It is a junction number, because it is equal to n+sod(n) for n = 18207996 and 18208014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7795 + ... + 9857.

It is an arithmetic number, because the mean of its divisors is an integer number (2278656).

Almost surely, 2^18208038 is an apocalyptic number.

18208038 is an abundant number, since it is smaller than the sum of its proper divisors (18250458).

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

18208038 is a wasteful number, since it uses less digits than its factorization.

18208038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3539.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 18208038 is about 4267.0877656781. The cubic root of 18208038 is about 263.0799296350.

The spelling of 18208038 in words is "eighteen million, two hundred eight thousand, thirty-eight".