18982718 has 4 divisors (see below), whose sum is σ = 28474080. Its totient is φ = 9491358.

The previous prime is 18982709. The next prime is 18982759. The reversal of 18982718 is 81728981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81728981 = 977 ⋅83653.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4745678 + ... + 4745681.

It is an arithmetic number, because the mean of its divisors is an integer number (7118520).

Almost surely, 2^18982718 is an apocalyptic number.

18982718 is a deficient number, since it is larger than the sum of its proper divisors (9491362).

18982718 is an equidigital number, since it uses as much as digits as its factorization.

18982718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9491361.

The product of its digits is 64512, while the sum is 44.

The square root of 18982718 is about 4356.9161111961. The cubic root of 18982718 is about 266.7592362648.

The spelling of 18982718 in words is "eighteen million, nine hundred eighty-two thousand, seven hundred eighteen".