21014199719 has 2 divisors, whose sum is σ = 21014199720. Its totient is φ = 21014199718.

The previous prime is 21014199673. The next prime is 21014199761. The reversal of 21014199719 is 91799141012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21014199719 - 2²⁰ = 21013151143 is a prime.

It is a super-2 number, since 2×21014199719² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21014199719.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21014199769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10507099859 + 10507099860.

It is an arithmetic number, because the mean of its divisors is an integer number (10507099860).

Almost surely, 2^21014199719 is an apocalyptic number.

21014199719 is a deficient number, since it is larger than the sum of its proper divisors (1).

21014199719 is an equidigital number, since it uses as much as digits as its factorization.

21014199719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 44.

The spelling of 21014199719 in words is "twenty-one billion, fourteen million, one hundred ninety-nine thousand, seven hundred nineteen".