20473606899769 has 2 divisors, whose sum is σ = 20473606899770. Its totient is φ = 20473606899768.

The previous prime is 20473606899709. The next prime is 20473606899787. The reversal of 20473606899769 is 96799860637402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20314058580544 + 159548319225 = 4507112^2 + 399435^2 .

It is a cyclic number.

It is not a de Polignac number, because 20473606899769 - 2¹⁷ = 20473606768697 is a prime.

It is a super-2 number, since 2×20473606899769² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20473606899695 and 20473606899704.

It is not a weakly prime, because it can be changed into another prime (20473606899709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10236803449884 + 10236803449885.

It is an arithmetic number, because the mean of its divisors is an integer number (10236803449885).

Almost surely, 2^{20473606899769} is an apocalyptic number.

It is an amenable number.

20473606899769 is a deficient number, since it is larger than the sum of its proper divisors (1).

20473606899769 is an equidigital number, since it uses as much as digits as its factorization.

20473606899769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1481421312, while the sum is 76.

The spelling of 20473606899769 in words is "twenty trillion, four hundred seventy-three billion, six hundred six million, eight hundred ninety-nine thousand, seven hundred sixty-nine".