20450042420287 has 2 divisors, whose sum is σ = 20450042420288. Its totient is φ = 20450042420286.

The previous prime is 20450042420221. The next prime is 20450042420323. The reversal of 20450042420287 is 78202424005402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20450042420287 - 2³¹ = 20447894936639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20450042420987) 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, 10225021210143 + 10225021210144.

It is an arithmetic number, because the mean of its divisors is an integer number (10225021210144).

Almost surely, 2^{20450042420287} is an apocalyptic number.

20450042420287 is a deficient number, since it is larger than the sum of its proper divisors (1).

20450042420287 is an equidigital number, since it uses as much as digits as its factorization.

20450042420287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 286720, while the sum is 40.

Adding to 20450042420287 its reverse (78202424005402), we get a palindrome (98652466425689).

The spelling of 20450042420287 in words is "twenty trillion, four hundred fifty billion, forty-two million, four hundred twenty thousand, two hundred eighty-seven".