20100719 has 2 divisors, whose sum is σ = 20100720. Its totient is φ = 20100718.

The previous prime is 20100713. The next prime is 20100721. The reversal of 20100719 is 91700102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20100719 - 2⁸ = 20100463 is a prime.

It is a super-2 number, since 2×20100719² = 808077808633922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 20100721, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20100719.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20100713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050359 + 10050360.

It is an arithmetic number, because the mean of its divisors is an integer number (10050360).

Almost surely, 2^20100719 is an apocalyptic number.

20100719 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100719 is an equidigital number, since it uses as much as digits as its factorization.

20100719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 20100719 is about 4483.3825400026. The cubic root of 20100719 is about 271.8966546190.

The spelling of 20100719 in words is "twenty million, one hundred thousand, seven hundred nineteen".