18107982 has 32 divisors (see below), whose sum is σ = 40815360. Its totient is φ = 5949720.

The previous prime is 18107981. The next prime is 18107983. The reversal of 18107982 is 28970181.

It is an interprime number because it is at equal distance from previous prime (18107981) and next prime (18107983).

It is a super-2 number, since 2×18107982² = 655798024224648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18107981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1473 + ... + 6195.

It is an arithmetic number, because the mean of its divisors is an integer number (1275480).

Almost surely, 2^18107982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18107982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20407680).

18107982 is an abundant number, since it is smaller than the sum of its proper divisors (22707378).

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

18107982 is a wasteful number, since it uses less digits than its factorization.

18107982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4805 (or 4799 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 18107982 is about 4255.3474593739. The cubic root of 18107982 is about 262.5971558732.

The spelling of 18107982 in words is "eighteen million, one hundred seven thousand, nine hundred eighty-two".