20669377358719 has 2 divisors, whose sum is σ = 20669377358720. Its totient is φ = 20669377358718.

The previous prime is 20669377358683. The next prime is 20669377358743. The reversal of 20669377358719 is 91785377396602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20669377358719 - 2²⁹ = 20668840487807 is a prime.

It is a super-2 number, since 2×20669377358719² (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 (20669377358419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10334688679359 + 10334688679360.

It is an arithmetic number, because the mean of its divisors is an integer number (10334688679360).

Almost surely, 2^{20669377358719} is an apocalyptic number.

20669377358719 is a deficient number, since it is larger than the sum of its proper divisors (1).

20669377358719 is an equidigital number, since it uses as much as digits as its factorization.

20669377358719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720135360, while the sum is 73.

The spelling of 20669377358719 in words is "twenty trillion, six hundred sixty-nine billion, three hundred seventy-seven million, three hundred fifty-eight thousand, seven hundred nineteen".