19826979299 has 2 divisors, whose sum is σ = 19826979300. Its totient is φ = 19826979298.

The previous prime is 19826979253. The next prime is 19826979329. The reversal of 19826979299 is 99297962891.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19826979299 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (19826979229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9913489649 + 9913489650.

It is an arithmetic number, because the mean of its divisors is an integer number (9913489650).

Almost surely, 2^19826979299 is an apocalyptic number.

19826979299 is a deficient number, since it is larger than the sum of its proper divisors (1).

19826979299 is an equidigital number, since it uses as much as digits as its factorization.

19826979299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79361856, while the sum is 71.

The spelling of 19826979299 in words is "nineteen billion, eight hundred twenty-six million, nine hundred seventy-nine thousand, two hundred ninety-nine".