18348938 has 12 divisors (see below), whose sum is σ = 28507830. Its totient is φ = 8857296.

The previous prime is 18348907. The next prime is 18348949. The reversal of 18348938 is 83984381.

It can be written as a sum of positive squares in 3 ways, for example, as 14010049 + 4338889 = 3743^2 + 2083^2 .

It is a super-3 number, since 3×18348938³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3773 + ... + 7136.

Almost surely, 2^18348938 is an apocalyptic number.

18348938 is a deficient number, since it is larger than the sum of its proper divisors (10158892).

18348938 is a wasteful number, since it uses less digits than its factorization.

18348938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10969 (or 10940 counting only the distinct ones).

The product of its digits is 165888, while the sum is 44.

The square root of 18348938 is about 4283.5660377774. The cubic root of 18348938 is about 263.7567874087.

The spelling of 18348938 in words is "eighteen million, three hundred forty-eight thousand, nine hundred thirty-eight".