19953536773 has 2 divisors, whose sum is σ = 19953536774. Its totient is φ = 19953536772.

The previous prime is 19953536737. The next prime is 19953536791. The reversal of 19953536773 is 37763535991.

Together with previous prime (19953536737) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13024972129 + 6928564644 = 114127^2 + 83238^2 .

It is a cyclic number.

It is not a de Polignac number, because 19953536773 - 2³³ = 11363602181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19953536573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9976768386 + 9976768387.

It is an arithmetic number, because the mean of its divisors is an integer number (9976768387).

Almost surely, 2^19953536773 is an apocalyptic number.

It is an amenable number.

19953536773 is a deficient number, since it is larger than the sum of its proper divisors (1).

19953536773 is an equidigital number, since it uses as much as digits as its factorization.

19953536773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16074450, while the sum is 58.

The spelling of 19953536773 in words is "nineteen billion, nine hundred fifty-three million, five hundred thirty-six thousand, seven hundred seventy-three".