19425042493 has 2 divisors, whose sum is σ = 19425042494. Its totient is φ = 19425042492.

The previous prime is 19425042487. The next prime is 19425042517. The reversal of 19425042493 is 39424052491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16603095609 + 2821946884 = 128853^2 + 53122^2 .

It is a cyclic number.

It is not a de Polignac number, because 19425042493 - 2²¹ = 19422945341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19425040493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9712521246 + 9712521247.

It is an arithmetic number, because the mean of its divisors is an integer number (9712521247).

Almost surely, 2^19425042493 is an apocalyptic number.

It is an amenable number.

19425042493 is a deficient number, since it is larger than the sum of its proper divisors (1).

19425042493 is an equidigital number, since it uses as much as digits as its factorization.

19425042493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 19425042493 in words is "nineteen billion, four hundred twenty-five million, forty-two thousand, four hundred ninety-three".