19425042499 has 4 divisors (see below), whose sum is σ = 19483728760. Its totient is φ = 19366356240.

The previous prime is 19425042493. The next prime is 19425042517. The reversal of 19425042499 is 99424052491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99424052491 = 233489 ⋅425819.

It is a cyclic number.

It is not a de Polignac number, because 19425042499 - 2²⁷ = 19290824771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19425042493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29342634 + ... + 29343295.

It is an arithmetic number, because the mean of its divisors is an integer number (4870932190).

Almost surely, 2^19425042499 is an apocalyptic number.

19425042499 is a deficient number, since it is larger than the sum of its proper divisors (58686261).

19425042499 is an equidigital number, since it uses as much as digits as its factorization.

19425042499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58686260.

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 19425042499 in words is "nineteen billion, four hundred twenty-five million, forty-two thousand, four hundred ninety-nine".