19823045771 has 2 divisors, whose sum is σ = 19823045772. Its totient is φ = 19823045770.

The previous prime is 19823045747. The next prime is 19823045779. The reversal of 19823045771 is 17754032891.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19823045771 is a prime.

It is not a weakly prime, because it can be changed into another prime (19823045779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9911522885 + 9911522886.

It is an arithmetic number, because the mean of its divisors is an integer number (9911522886).

Almost surely, 2^19823045771 is an apocalyptic number.

19823045771 is a deficient number, since it is larger than the sum of its proper divisors (1).

19823045771 is an equidigital number, since it uses as much as digits as its factorization.

19823045771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 19823045771 in words is "nineteen billion, eight hundred twenty-three million, forty-five thousand, seven hundred seventy-one".