19442743 has 2 divisors, whose sum is σ = 19442744. Its totient is φ = 19442742.

The previous prime is 19442741. The next prime is 19442749. The reversal of 19442743 is 34724491.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (34724491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19442743 - 2¹ = 19442741 is a prime.

Together with 19442741, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 19442699 and 19442708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19442741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9721371 + 9721372.

It is an arithmetic number, because the mean of its divisors is an integer number (9721372).

Almost surely, 2^19442743 is an apocalyptic number.

19442743 is a deficient number, since it is larger than the sum of its proper divisors (1).

19442743 is an equidigital number, since it uses as much as digits as its factorization.

19442743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 34.

The square root of 19442743 is about 4409.3925885546. The cubic root of 19442743 is about 268.8969307966.

The spelling of 19442743 in words is "nineteen million, four hundred forty-two thousand, seven hundred forty-three".