20443245019 has 2 divisors, whose sum is σ = 20443245020. Its totient is φ = 20443245018.

The previous prime is 20443244999. The next prime is 20443245023. The reversal of 20443245019 is 91054234402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20443245019 is a prime.

It is a super-2 number, since 2×20443245019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20443545019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221622509 + 10221622510.

It is an arithmetic number, because the mean of its divisors is an integer number (10221622510).

Almost surely, 2^20443245019 is an apocalyptic number.

20443245019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20443245019 is an equidigital number, since it uses as much as digits as its factorization.

20443245019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 20443245019 in words is "twenty billion, four hundred forty-three million, two hundred forty-five thousand, nineteen".