18741013 has 2 divisors, whose sum is σ = 18741014. Its totient is φ = 18741012.

The previous prime is 18741007. The next prime is 18741017. The reversal of 18741013 is 31014781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15421329 + 3319684 = 3927^2 + 1822^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18741013 is a prime.

It is equal to p_1195603 and since 18741013 and 1195603 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18741017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9370506 + 9370507.

It is an arithmetic number, because the mean of its divisors is an integer number (9370507).

Almost surely, 2^18741013 is an apocalyptic number.

It is an amenable number.

18741013 is a deficient number, since it is larger than the sum of its proper divisors (1).

18741013 is an equidigital number, since it uses as much as digits as its factorization.

18741013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 18741013 is about 4329.0891651709. The cubic root of 18741013 is about 265.6221905677.

Adding to 18741013 its reverse (31014781), we get a palindrome (49755794).

The spelling of 18741013 in words is "eighteen million, seven hundred forty-one thousand, thirteen".