20516225514443 has 2 divisors, whose sum is σ = 20516225514444. Its totient is φ = 20516225514442.

The previous prime is 20516225514361. The next prime is 20516225514487. The reversal of 20516225514443 is 34441552261502.

It is an a-pointer prime, because the next prime (20516225514487) can be obtained adding 20516225514443 to its sum of digits (44).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20516225514443 - 2¹⁶ = 20516225448907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20516225514394 and 20516225514403.

It is not a weakly prime, because it can be changed into another prime (20516225514493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10258112757221 + 10258112757222.

It is an arithmetic number, because the mean of its divisors is an integer number (10258112757222).

Almost surely, 2^{20516225514443} is an apocalyptic number.

20516225514443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20516225514443 is an equidigital number, since it uses as much as digits as its factorization.

20516225514443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152000, while the sum is 44.

Adding to 20516225514443 its reverse (34441552261502), we get a palindrome (54957777775945).

The spelling of 20516225514443 in words is "twenty trillion, five hundred sixteen billion, two hundred twenty-five million, five hundred fourteen thousand, four hundred forty-three".