18982709 has 2 divisors, whose sum is σ = 18982710. Its totient is φ = 18982708.

The previous prime is 18982679. The next prime is 18982759. The reversal of 18982709 is 90728981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18879025 + 103684 = 4345^2 + 322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18982709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18982709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18982759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9491354 + 9491355.

It is an arithmetic number, because the mean of its divisors is an integer number (9491355).

Almost surely, 2^18982709 is an apocalyptic number.

It is an amenable number.

18982709 is a deficient number, since it is larger than the sum of its proper divisors (1).

18982709 is an equidigital number, since it uses as much as digits as its factorization.

18982709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 18982709 is about 4356.9150783553. The cubic root of 18982709 is about 266.7591941066.

It can be divided in two parts, 18982 and 709, that added together give a palindrome (19691).

The spelling of 18982709 in words is "eighteen million, nine hundred eighty-two thousand, seven hundred nine".