19842064441 has 2 divisors, whose sum is σ = 19842064442. Its totient is φ = 19842064440.

The previous prime is 19842064433. The next prime is 19842064447. The reversal of 19842064441 is 14446024891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19017513216 + 824551225 = 137904^2 + 28715^2 .

It is a cyclic number.

It is not a de Polignac number, because 19842064441 - 2³ = 19842064433 is a prime.

It is not a weakly prime, because it can be changed into another prime (19842064447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9921032220 + 9921032221.

It is an arithmetic number, because the mean of its divisors is an integer number (9921032221).

Almost surely, 2^19842064441 is an apocalyptic number.

It is an amenable number.

19842064441 is a deficient number, since it is larger than the sum of its proper divisors (1).

19842064441 is an equidigital number, since it uses as much as digits as its factorization.

19842064441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 43.

The spelling of 19842064441 in words is "nineteen billion, eight hundred forty-two million, sixty-four thousand, four hundred forty-one".