18982243 has 8 divisors (see below), whose sum is σ = 21909600. Its totient is φ = 16108800.

The previous prime is 18982231. The next prime is 18982253. The reversal of 18982243 is 34228981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18982243 - 2⁹ = 18981731 is a prime.

It is a super-2 number, since 2×18982243² = 720651098622098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18982253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12718 + ... + 14131.

It is an arithmetic number, because the mean of its divisors is an integer number (2738700).

Almost surely, 2^18982243 is an apocalyptic number.

18982243 is a deficient number, since it is larger than the sum of its proper divisors (2927357).

18982243 is a wasteful number, since it uses less digits than its factorization.

18982243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26957.

The product of its digits is 27648, while the sum is 37.

The square root of 18982243 is about 4356.8615998216. The cubic root of 18982243 is about 266.7570112288.

The spelling of 18982243 in words is "eighteen million, nine hundred eighty-two thousand, two hundred forty-three".