20552166913 has 2 divisors, whose sum is σ = 20552166914. Its totient is φ = 20552166912.

The previous prime is 20552166911. The next prime is 20552166917. The reversal of 20552166913 is 31966125502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13015843569 + 7536323344 = 114087^2 + 86812^2 .

It is a cyclic number.

It is not a de Polignac number, because 20552166913 - 2¹ = 20552166911 is a prime.

Together with 20552166911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20552166911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10276083456 + 10276083457.

It is an arithmetic number, because the mean of its divisors is an integer number (10276083457).

Almost surely, 2^20552166913 is an apocalyptic number.

It is an amenable number.

20552166913 is a deficient number, since it is larger than the sum of its proper divisors (1).

20552166913 is an equidigital number, since it uses as much as digits as its factorization.

20552166913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 20552166913 in words is "twenty billion, five hundred fifty-two million, one hundred sixty-six thousand, nine hundred thirteen".