19623073243 has 2 divisors, whose sum is σ = 19623073244. Its totient is φ = 19623073242.

The previous prime is 19623073229. The next prime is 19623073303. The reversal of 19623073243 is 34237032691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19623073243 - 2⁹ = 19623072731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19623073196 and 19623073205.

It is not a weakly prime, because it can be changed into another prime (19623073643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9811536621 + 9811536622.

It is an arithmetic number, because the mean of its divisors is an integer number (9811536622).

Almost surely, 2^19623073243 is an apocalyptic number.

19623073243 is a deficient number, since it is larger than the sum of its proper divisors (1).

19623073243 is an equidigital number, since it uses as much as digits as its factorization.

19623073243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 40.

The spelling of 19623073243 in words is "nineteen billion, six hundred twenty-three million, seventy-three thousand, two hundred forty-three".