19425094991 has 2 divisors, whose sum is σ = 19425094992. Its totient is φ = 19425094990.

The previous prime is 19425094957. The next prime is 19425095021. The reversal of 19425094991 is 19949052491.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19425094991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19425094921) 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, 9712547495 + 9712547496.

It is an arithmetic number, because the mean of its divisors is an integer number (9712547496).

Almost surely, 2^19425094991 is an apocalyptic number.

19425094991 is a deficient number, since it is larger than the sum of its proper divisors (1).

19425094991 is an equidigital number, since it uses as much as digits as its factorization.

19425094991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 53.

The spelling of 19425094991 in words is "nineteen billion, four hundred twenty-five million, ninety-four thousand, nine hundred ninety-one".