20859619026469 has 2 divisors, whose sum is σ = 20859619026470. Its totient is φ = 20859619026468.

The previous prime is 20859619026443. The next prime is 20859619026473. The reversal of 20859619026469 is 96462091695802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17163728125569 + 3695890900900 = 4142913^2 + 1922470^2 .

It is a cyclic number.

It is not a de Polignac number, because 20859619026469 - 2²¹ = 20859616929317 is a prime.

It is a super-2 number, since 2×20859619026469² (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 (20859619026439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10429809513234 + 10429809513235.

It is an arithmetic number, because the mean of its divisors is an integer number (10429809513235).

Almost surely, 2^{20859619026469} is an apocalyptic number.

It is an amenable number.

20859619026469 is a deficient number, since it is larger than the sum of its proper divisors (1).

20859619026469 is an equidigital number, since it uses as much as digits as its factorization.

20859619026469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100776960, while the sum is 67.

The spelling of 20859619026469 in words is "twenty trillion, eight hundred fifty-nine billion, six hundred nineteen million, twenty-six thousand, four hundred sixty-nine".