19776492743 has 4 divisors (see below), whose sum is σ = 22601706000. Its totient is φ = 16951279488.

The previous prime is 19776492733. The next prime is 19776492767. The reversal of 19776492743 is 34729467791.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19776492743 - 2⁸ = 19776492487 is a prime.

It is a super-2 number, since 2×19776492743² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19776492713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1412606618 + ... + 1412606631.

It is an arithmetic number, because the mean of its divisors is an integer number (5650426500).

Almost surely, 2^19776492743 is an apocalyptic number.

19776492743 is a deficient number, since it is larger than the sum of its proper divisors (2825213257).

19776492743 is an equidigital number, since it uses as much as digits as its factorization.

19776492743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825213256.

The product of its digits is 16003008, while the sum is 59.

The spelling of 19776492743 in words is "nineteen billion, seven hundred seventy-six million, four hundred ninety-two thousand, seven hundred forty-three".