19914175679 has 2 divisors, whose sum is σ = 19914175680. Its totient is φ = 19914175678.

The previous prime is 19914175657. The next prime is 19914175681. The reversal of 19914175679 is 97657141991.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19914175679 is a prime.

It is a super-2 number, since 2×19914175679² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 19914175681, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19914175079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9957087839 + 9957087840.

It is an arithmetic number, because the mean of its divisors is an integer number (9957087840).

Almost surely, 2^19914175679 is an apocalyptic number.

19914175679 is a deficient number, since it is larger than the sum of its proper divisors (1).

19914175679 is an equidigital number, since it uses as much as digits as its factorization.

19914175679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4286520, while the sum is 59.

The spelling of 19914175679 in words is "nineteen billion, nine hundred fourteen million, one hundred seventy-five thousand, six hundred seventy-nine".