18982340 has 24 divisors (see below), whose sum is σ = 42929880. Its totient is φ = 7008768.

The previous prime is 18982339. The next prime is 18982391. The reversal of 18982340 is 4328981.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42436 + 18939904 = 206^2 + 4352^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18982340.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36245 + ... + 36764.

It is an arithmetic number, because the mean of its divisors is an integer number (1788745).

Almost surely, 2^18982340 is an apocalyptic number.

18982340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18982340 is an abundant number, since it is smaller than the sum of its proper divisors (23947540).

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

18982340 is a wasteful number, since it uses less digits than its factorization.

18982340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73031 (or 73029 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 18982340 is about 4356.8727316735. The cubic root of 18982340 is about 266.7574656076.

The spelling of 18982340 in words is "eighteen million, nine hundred eighty-two thousand, three hundred forty".