20465242622689 has 2 divisors, whose sum is σ = 20465242622690. Its totient is φ = 20465242622688.

The previous prime is 20465242622651. The next prime is 20465242622771. The reversal of 20465242622689 is 98622624256402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13354529728225 + 7110712894464 = 3654385^2 + 2666592^2 .

It is a cyclic number.

It is not a de Polignac number, because 20465242622689 - 2¹³ = 20465242614497 is a prime.

It is not a weakly prime, because it can be changed into another prime (20465242652689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10232621311344 + 10232621311345.

It is an arithmetic number, because the mean of its divisors is an integer number (10232621311345).

Almost surely, 2^{20465242622689} is an apocalyptic number.

It is an amenable number.

20465242622689 is a deficient number, since it is larger than the sum of its proper divisors (1).

20465242622689 is an equidigital number, since it uses as much as digits as its factorization.

20465242622689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39813120, while the sum is 58.

The spelling of 20465242622689 in words is "twenty trillion, four hundred sixty-five billion, two hundred forty-two million, six hundred twenty-two thousand, six hundred eighty-nine".