19942831277 has 2 divisors, whose sum is σ = 19942831278. Its totient is φ = 19942831276.

The previous prime is 19942831253. The next prime is 19942831313. The reversal of 19942831277 is 77213824991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19909492201 + 33339076 = 141101^2 + 5774^2 .

It is an emirp because it is prime and its reverse (77213824991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19942831277 - 2¹² = 19942827181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19942831877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9971415638 + 9971415639.

It is an arithmetic number, because the mean of its divisors is an integer number (9971415639).

Almost surely, 2^19942831277 is an apocalyptic number.

It is an amenable number.

19942831277 is a deficient number, since it is larger than the sum of its proper divisors (1).

19942831277 is an equidigital number, since it uses as much as digits as its factorization.

19942831277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 53.

The spelling of 19942831277 in words is "nineteen billion, nine hundred forty-two million, eight hundred thirty-one thousand, two hundred seventy-seven".