19743739043 has 4 divisors (see below), whose sum is σ = 22564273200. Its totient is φ = 16923204888.

The previous prime is 19743738977. The next prime is 19743739069. The reversal of 19743739043 is 34093734791.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34093734791 = 2437 ⋅13990043.

It is a cyclic number.

It is not a de Polignac number, because 19743739043 - 2¹⁴ = 19743722659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19743738982 and 19743739000.

It is not an unprimeable number, because it can be changed into a prime (19743739073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1410267068 + ... + 1410267081.

It is an arithmetic number, because the mean of its divisors is an integer number (5641068300).

Almost surely, 2^19743739043 is an apocalyptic number.

19743739043 is a deficient number, since it is larger than the sum of its proper divisors (2820534157).

19743739043 is an equidigital number, since it uses as much as digits as its factorization.

19743739043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820534156.

The product of its (nonzero) digits is 1714608, while the sum is 50.

The spelling of 19743739043 in words is "nineteen billion, seven hundred forty-three million, seven hundred thirty-nine thousand, forty-three".