19775673354823 has 2 divisors, whose sum is σ = 19775673354824. Its totient is φ = 19775673354822.

The previous prime is 19775673354599. The next prime is 19775673354863. The reversal of 19775673354823 is 32845337657791.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19775673354823 is a prime.

It is a super-2 number, since 2×19775673354823² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19775673354863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9887836677411 + 9887836677412.

It is an arithmetic number, because the mean of its divisors is an integer number (9887836677412).

Almost surely, 2^{19775673354823} is an apocalyptic number.

19775673354823 is a deficient number, since it is larger than the sum of its proper divisors (1).

19775673354823 is an equidigital number, since it uses as much as digits as its factorization.

19775673354823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 800150400, while the sum is 70.

The spelling of 19775673354823 in words is "nineteen trillion, seven hundred seventy-five billion, six hundred seventy-three million, three hundred fifty-four thousand, eight hundred twenty-three".