18804943 has 2 divisors, whose sum is σ = 18804944. Its totient is φ = 18804942.

The previous prime is 18804913. The next prime is 18804959. The reversal of 18804943 is 34940881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18804943 - 2⁵ = 18804911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18804913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9402471 + 9402472.

It is an arithmetic number, because the mean of its divisors is an integer number (9402472).

Almost surely, 2^18804943 is an apocalyptic number.

18804943 is a deficient number, since it is larger than the sum of its proper divisors (1).

18804943 is an equidigital number, since it uses as much as digits as its factorization.

18804943 is an odious number, because the sum of its binary digits is odd.

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

The square root of 18804943 is about 4336.4666492434. The cubic root of 18804943 is about 265.9238810219.

The spelling of 18804943 in words is "eighteen million, eight hundred four thousand, nine hundred forty-three".