18802943 has 2 divisors, whose sum is σ = 18802944. Its totient is φ = 18802942.

The previous prime is 18802921. The next prime is 18802963. The reversal of 18802943 is 34920881.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (34920881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18802943 - 2⁸ = 18802687 is a prime.

It is a super-2 number, since 2×18802943² = 707101330922498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18802963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9401471 + 9401472.

It is an arithmetic number, because the mean of its divisors is an integer number (9401472).

Almost surely, 2^18802943 is an apocalyptic number.

18802943 is a deficient number, since it is larger than the sum of its proper divisors (1).

18802943 is an equidigital number, since it uses as much as digits as its factorization.

18802943 is an odious number, because the sum of its binary digits is odd.

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

The square root of 18802943 is about 4336.2360406233. The cubic root of 18802943 is about 265.9144532415.

The spelling of 18802943 in words is "eighteen million, eight hundred two thousand, nine hundred forty-three".