19142868749 has 2 divisors, whose sum is σ = 19142868750. Its totient is φ = 19142868748.

The previous prime is 19142868727. The next prime is 19142868769. The reversal of 19142868749 is 94786824191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18344806249 + 798062500 = 135443^2 + 28250^2 .

It is a cyclic number.

It is not a de Polignac number, because 19142868749 - 2²⁸ = 18874433293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19142868769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9571434374 + 9571434375.

It is an arithmetic number, because the mean of its divisors is an integer number (9571434375).

Almost surely, 2^19142868749 is an apocalyptic number.

It is an amenable number.

19142868749 is a deficient number, since it is larger than the sum of its proper divisors (1).

19142868749 is an equidigital number, since it uses as much as digits as its factorization.

19142868749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6967296, while the sum is 59.

The spelling of 19142868749 in words is "nineteen billion, one hundred forty-two million, eight hundred sixty-eight thousand, seven hundred forty-nine".