19674773669 has 2 divisors, whose sum is σ = 19674773670. Its totient is φ = 19674773668.

The previous prime is 19674773647. The next prime is 19674773681. The reversal of 19674773669 is 96637747691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14193148225 + 5481625444 = 119135^2 + 74038^2 .

It is a cyclic number.

It is not a de Polignac number, because 19674773669 - 2¹⁶ = 19674708133 is a prime.

It is a super-2 number, since 2×19674773669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19674773269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9837386834 + 9837386835.

It is an arithmetic number, because the mean of its divisors is an integer number (9837386835).

Almost surely, 2^19674773669 is an apocalyptic number.

It is an amenable number.

19674773669 is a deficient number, since it is larger than the sum of its proper divisors (1).

19674773669 is an equidigital number, since it uses as much as digits as its factorization.

19674773669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72013536, while the sum is 65.

The spelling of 19674773669 in words is "nineteen billion, six hundred seventy-four million, seven hundred seventy-three thousand, six hundred sixty-nine".