19641223583 has 2 divisors, whose sum is σ = 19641223584. Its totient is φ = 19641223582.

The previous prime is 19641223489. The next prime is 19641223607. The reversal of 19641223583 is 38532214691.

It is a strong prime.

It is an emirp because it is prime and its reverse (38532214691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19641223583 - 2¹² = 19641219487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19641223883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9820611791 + 9820611792.

It is an arithmetic number, because the mean of its divisors is an integer number (9820611792).

Almost surely, 2^19641223583 is an apocalyptic number.

19641223583 is a deficient number, since it is larger than the sum of its proper divisors (1).

19641223583 is an equidigital number, since it uses as much as digits as its factorization.

19641223583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The spelling of 19641223583 in words is "nineteen billion, six hundred forty-one million, two hundred twenty-three thousand, five hundred eighty-three".