20542382252069 has 2 divisors, whose sum is σ = 20542382252070. Its totient is φ = 20542382252068.

The previous prime is 20542382251927. The next prime is 20542382252101. The reversal of 20542382252069 is 96025228324502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15570418807969 + 4971963444100 = 3945937^2 + 2229790^2 .

It is a cyclic number.

It is not a de Polignac number, because 20542382252069 - 2⁸ = 20542382251813 is a prime.

It is a super-2 number, since 2×20542382252069² (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 (20542382152069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10271191126034 + 10271191126035.

It is an arithmetic number, because the mean of its divisors is an integer number (10271191126035).

Almost surely, 2^{20542382252069} is an apocalyptic number.

It is an amenable number.

20542382252069 is a deficient number, since it is larger than the sum of its proper divisors (1).

20542382252069 is an equidigital number, since it uses as much as digits as its factorization.

20542382252069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4147200, while the sum is 50.

The spelling of 20542382252069 in words is "twenty trillion, five hundred forty-two billion, three hundred eighty-two million, two hundred fifty-two thousand, sixty-nine".