19904111 has 2 divisors, whose sum is σ = 19904112. Its totient is φ = 19904110.

The previous prime is 19904083. The next prime is 19904119. The reversal of 19904111 is 11140991.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19904111 is a prime.

It is equal to p_1264850 and since 19904111 and 1264850 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 (19904119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9952055 + 9952056.

It is an arithmetic number, because the mean of its divisors is an integer number (9952056).

Almost surely, 2^19904111 is an apocalyptic number.

19904111 is a deficient number, since it is larger than the sum of its proper divisors (1).

19904111 is an equidigital number, since it uses as much as digits as its factorization.

19904111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 19904111 is about 4461.4023580036. The cubic root of 19904111 is about 271.0072618706.

The spelling of 19904111 in words is "nineteen million, nine hundred four thousand, one hundred eleven".