18795919 has 2 divisors, whose sum is σ = 18795920. Its totient is φ = 18795918.

The previous prime is 18795893. The next prime is 18795923. The reversal of 18795919 is 91959781.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (91959781) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18795919 is a prime.

It is a super-2 number, since 2×18795919² = 706573142109122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18795929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9397959 + 9397960.

It is an arithmetic number, because the mean of its divisors is an integer number (9397960).

Almost surely, 2^18795919 is an apocalyptic number.

18795919 is a deficient number, since it is larger than the sum of its proper divisors (1).

18795919 is an equidigital number, since it uses as much as digits as its factorization.

18795919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 49.

The square root of 18795919 is about 4335.4260459613. The cubic root of 18795919 is about 265.8813375790.

The spelling of 18795919 in words is "eighteen million, seven hundred ninety-five thousand, nine hundred nineteen".