18819043 has 2 divisors, whose sum is σ = 18819044. Its totient is φ = 18819042.

The previous prime is 18819029. The next prime is 18819061. The reversal of 18819043 is 34091881.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18819043 - 2⁵ = 18819011 is a prime.

It is not a weakly prime, because it can be changed into another prime (18819013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9409521 + 9409522.

It is an arithmetic number, because the mean of its divisors is an integer number (9409522).

Almost surely, 2^18819043 is an apocalyptic number.

18819043 is a deficient number, since it is larger than the sum of its proper divisors (1).

18819043 is an equidigital number, since it uses as much as digits as its factorization.

18819043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 18819043 is about 4338.0920921530. The cubic root of 18819043 is about 265.9903279126.

The spelling of 18819043 in words is "eighteen million, eight hundred nineteen thousand, forty-three".