19744342625 has 32 divisors (see below), whose sum is σ = 28638455040. Its totient is φ = 13309468800.

The previous prime is 19744342621. The next prime is 19744342633. The reversal of 19744342625 is 52624344791.

It is not a de Polignac number, because 19744342625 - 2² = 19744342621 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19744342625.

It is not an unprimeable number, because it can be changed into a prime (19744342621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139604 + ... + 242853.

It is an arithmetic number, because the mean of its divisors is an integer number (894951720).

Almost surely, 2^19744342625 is an apocalyptic number.

It is an amenable number.

19744342625 is a deficient number, since it is larger than the sum of its proper divisors (8894112415).

19744342625 is an equidigital number, since it uses as much as digits as its factorization.

19744342625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382538 (or 382528 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 47.

The spelling of 19744342625 in words is "nineteen billion, seven hundred forty-four million, three hundred forty-two thousand, six hundred twenty-five".