19344844399 has 2 divisors, whose sum is σ = 19344844400. Its totient is φ = 19344844398.

The previous prime is 19344844271. The next prime is 19344844403. The reversal of 19344844399 is 99344844391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19344844399 - 2⁷ = 19344844271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19344844499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9672422199 + 9672422200.

It is an arithmetic number, because the mean of its divisors is an integer number (9672422200).

Almost surely, 2^19344844399 is an apocalyptic number.

19344844399 is a deficient number, since it is larger than the sum of its proper divisors (1).

19344844399 is an equidigital number, since it uses as much as digits as its factorization.

19344844399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13436928, while the sum is 58.

The spelling of 19344844399 in words is "nineteen billion, three hundred forty-four million, eight hundred forty-four thousand, three hundred ninety-nine".