20196072544451 has 2 divisors, whose sum is σ = 20196072544452. Its totient is φ = 20196072544450.

The previous prime is 20196072544447. The next prime is 20196072544477. The reversal of 20196072544451 is 15444527069102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20196072544451 - 2² = 20196072544447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20196072544451.

It is not a weakly prime, because it can be changed into another prime (20196072544481) 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, 10098036272225 + 10098036272226.

It is an arithmetic number, because the mean of its divisors is an integer number (10098036272226).

Almost surely, 2^{20196072544451} is an apocalyptic number.

20196072544451 is a deficient number, since it is larger than the sum of its proper divisors (1).

20196072544451 is an equidigital number, since it uses as much as digits as its factorization.

20196072544451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 20196072544451 in words is "twenty trillion, one hundred ninety-six billion, seventy-two million, five hundred forty-four thousand, four hundred fifty-one".