18790841 has 2 divisors, whose sum is σ = 18790842. Its totient is φ = 18790840.

The previous prime is 18790823. The next prime is 18790847. The reversal of 18790841 is 14809781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15832441 + 2958400 = 3979^2 + 1720^2 .

It is a cyclic number.

It is not a de Polignac number, because 18790841 - 2⁶ = 18790777 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18790795 and 18790804.

It is not a weakly prime, because it can be changed into another prime (18790847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9395420 + 9395421.

It is an arithmetic number, because the mean of its divisors is an integer number (9395421).

Almost surely, 2^18790841 is an apocalyptic number.

It is an amenable number.

18790841 is a deficient number, since it is larger than the sum of its proper divisors (1).

18790841 is an equidigital number, since it uses as much as digits as its factorization.

18790841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 18790841 is about 4334.8403661496. The cubic root of 18790841 is about 265.8573914760.

The spelling of 18790841 in words is "eighteen million, seven hundred ninety thousand, eight hundred forty-one".