19626124979 has 2 divisors, whose sum is σ = 19626124980. Its totient is φ = 19626124978.

The previous prime is 19626124949. The next prime is 19626124981. The reversal of 19626124979 is 97942162691.

It is a strong prime.

It is an emirp because it is prime and its reverse (97942162691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19626124979 - 2⁸ = 19626124723 is a prime.

Together with 19626124981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19626124949) 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, 9813062489 + 9813062490.

It is an arithmetic number, because the mean of its divisors is an integer number (9813062490).

Almost surely, 2^19626124979 is an apocalyptic number.

19626124979 is a deficient number, since it is larger than the sum of its proper divisors (1).

19626124979 is an equidigital number, since it uses as much as digits as its factorization.

19626124979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 56.

The spelling of 19626124979 in words is "nineteen billion, six hundred twenty-six million, one hundred twenty-four thousand, nine hundred seventy-nine".