18690041 has 2 divisors, whose sum is σ = 18690042. Its totient is φ = 18690040.

The previous prime is 18690037. The next prime is 18690043. The reversal of 18690041 is 14009681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17682025 + 1008016 = 4205^2 + 1004^2 .

It is a cyclic number.

It is not a de Polignac number, because 18690041 - 2² = 18690037 is a prime.

Together with 18690043, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18689986 and 18690013.

It is not a weakly prime, because it can be changed into another prime (18690043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9345020 + 9345021.

It is an arithmetic number, because the mean of its divisors is an integer number (9345021).

Almost surely, 2^18690041 is an apocalyptic number.

It is an amenable number.

18690041 is a deficient number, since it is larger than the sum of its proper divisors (1).

18690041 is an equidigital number, since it uses as much as digits as its factorization.

18690041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 18690041 is about 4323.1980061061. The cubic root of 18690041 is about 265.3811579254.

The spelling of 18690041 in words is "eighteen million, six hundred ninety thousand, forty-one".