18982140 has 48 divisors (see below), whose sum is σ = 55950720. Its totient is φ = 4795200.

The previous prime is 18982127. The next prime is 18982141. The reversal of 18982140 is 4128981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18982141) 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, 7186 + ... + 9465.

It is an arithmetic number, because the mean of its divisors is an integer number (1165640).

Almost surely, 2^18982140 is an apocalyptic number.

18982140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18982140 is an abundant number, since it is smaller than the sum of its proper divisors (36968580).

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

18982140 is a wasteful number, since it uses less digits than its factorization.

18982140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16682 (or 16680 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 18982140 is about 4356.8497793704. The cubic root of 18982140 is about 266.7565287424.

The spelling of 18982140 in words is "eighteen million, nine hundred eighty-two thousand, one hundred forty".