20525220451469 has 2 divisors, whose sum is σ = 20525220451470. Its totient is φ = 20525220451468.

The previous prime is 20525220451441. The next prime is 20525220451493. The reversal of 20525220451469 is 96415402252502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12345820650244 + 8179399801225 = 3513662^2 + 2859965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20525220451469 is a prime.

It is a super-2 number, since 2×20525220451469² (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 (20525220453469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10262610225734 + 10262610225735.

It is an arithmetic number, because the mean of its divisors is an integer number (10262610225735).

Almost surely, 2^{20525220451469} is an apocalyptic number.

It is an amenable number.

20525220451469 is a deficient number, since it is larger than the sum of its proper divisors (1).

20525220451469 is an equidigital number, since it uses as much as digits as its factorization.

20525220451469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 20525220451469 in words is "twenty trillion, five hundred twenty-five billion, two hundred twenty million, four hundred fifty-one thousand, four hundred sixty-nine".