20511445355119 has 2 divisors, whose sum is σ = 20511445355120. Its totient is φ = 20511445355118.

The previous prime is 20511445355117. The next prime is 20511445355153. The reversal of 20511445355119 is 91155354411502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20511445355119 - 2¹ = 20511445355117 is a prime.

It is a super-2 number, since 2×20511445355119² (a number of 27 digits) contains 22 as substring.

Together with 20511445355117, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20511445355113) 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, 10255722677559 + 10255722677560.

It is an arithmetic number, because the mean of its divisors is an integer number (10255722677560).

Almost surely, 2^{20511445355119} is an apocalyptic number.

20511445355119 is a deficient number, since it is larger than the sum of its proper divisors (1).

20511445355119 is an equidigital number, since it uses as much as digits as its factorization.

20511445355119 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540000, while the sum is 46.

The spelling of 20511445355119 in words is "twenty trillion, five hundred eleven billion, four hundred forty-five million, three hundred fifty-five thousand, one hundred nineteen".