19842741823 has 2 divisors, whose sum is σ = 19842741824. Its totient is φ = 19842741822.

The previous prime is 19842741817. The next prime is 19842741829. The reversal of 19842741823 is 32814724891.

It is a balanced prime because it is at equal distance from previous prime (19842741817) and next prime (19842741829).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19842741823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19842741829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9921370911 + 9921370912.

It is an arithmetic number, because the mean of its divisors is an integer number (9921370912).

Almost surely, 2^19842741823 is an apocalyptic number.

19842741823 is a deficient number, since it is larger than the sum of its proper divisors (1).

19842741823 is an equidigital number, since it uses as much as digits as its factorization.

19842741823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 49.

The spelling of 19842741823 in words is "nineteen billion, eight hundred forty-two million, seven hundred forty-one thousand, eight hundred twenty-three".