19783356943 has 16 divisors (see below), whose sum is σ = 23955381504. Its totient is φ = 15949111680.

The previous prime is 19783356899. The next prime is 19783356953. The reversal of 19783356943 is 34965338791.

It is not a de Polignac number, because 19783356943 - 2⁹ = 19783356431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19783356953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127896 + ... + 236482.

It is an arithmetic number, because the mean of its divisors is an integer number (1497211344).

Almost surely, 2^19783356943 is an apocalyptic number.

19783356943 is a deficient number, since it is larger than the sum of its proper divisors (4172024561).

19783356943 is a wasteful number, since it uses less digits than its factorization.

19783356943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110142.

The product of its digits is 14696640, while the sum is 58.

The spelling of 19783356943 in words is "nineteen billion, seven hundred eighty-three million, three hundred fifty-six thousand, nine hundred forty-three".