19744294659 has 4 divisors (see below), whose sum is σ = 26325726216. Its totient is φ = 13162863104.

The previous prime is 19744294607. The next prime is 19744294741. The reversal of 19744294659 is 95649244791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19744294659 - 2²¹ = 19742197507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19744298659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3290715774 + ... + 3290715779.

It is an arithmetic number, because the mean of its divisors is an integer number (6581431554).

Almost surely, 2^19744294659 is an apocalyptic number.

19744294659 is a deficient number, since it is larger than the sum of its proper divisors (6581431557).

19744294659 is an equidigital number, since it uses as much as digits as its factorization.

19744294659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6581431556.

The product of its digits is 19595520, while the sum is 60.

The spelling of 19744294659 in words is "nineteen billion, seven hundred forty-four million, two hundred ninety-four thousand, six hundred fifty-nine".