18982938 has 32 divisors (see below), whose sum is σ = 43041600. Its totient is φ = 5533056.

The previous prime is 18982937. The next prime is 18982949. The reversal of 18982938 is 83928981.

It is a happy number.

It is a super-2 number, since 2×18982938² = 720703870223688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18982933) 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, 4923 + ... + 7886.

It is an arithmetic number, because the mean of its divisors is an integer number (1345050).

Almost surely, 2^18982938 is an apocalyptic number.

18982938 is an abundant number, since it is smaller than the sum of its proper divisors (24058662).

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

18982938 is a wasteful number, since it uses less digits than its factorization.

18982938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12846.

The product of its digits is 248832, while the sum is 48.

The square root of 18982938 is about 4356.9413583384. The cubic root of 18982938 is about 266.7602667952.

The spelling of 18982938 in words is "eighteen million, nine hundred eighty-two thousand, nine hundred thirty-eight".