18485982 has 56 divisors (see below), whose sum is σ = 43020480. Its totient is φ = 5948640.

The previous prime is 18485981. The next prime is 18486011. The reversal of 18485982 is 28958481.

It is a happy number.

18485982 is a `hidden beast` number, since 18 + 48 + 598 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18485981) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 44994 + ... + 45402.

Almost surely, 2^18485982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18485982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21510240).

18485982 is an abundant number, since it is smaller than the sum of its proper divisors (24534498).

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

18485982 is an equidigital number, since it uses as much as digits as its factorization.

18485982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460 (or 445 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 18485982 is about 4299.5327653130. The cubic root of 18485982 is about 264.4118056499.

The spelling of 18485982 in words is "eighteen million, four hundred eighty-five thousand, nine hundred eighty-two".