20243320387 has 2 divisors, whose sum is σ = 20243320388. Its totient is φ = 20243320386.

The previous prime is 20243320343. The next prime is 20243320411. The reversal of 20243320387 is 78302334202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20243320387 - 2²³ = 20234931779 is a prime.

It is not a weakly prime, because it can be changed into another prime (20243320187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10121660193 + 10121660194.

It is an arithmetic number, because the mean of its divisors is an integer number (10121660194).

Almost surely, 2^20243320387 is an apocalyptic number.

20243320387 is a deficient number, since it is larger than the sum of its proper divisors (1).

20243320387 is an equidigital number, since it uses as much as digits as its factorization.

20243320387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 34.

Adding to 20243320387 its reverse (78302334202), we get a palindrome (98545654589).

The spelling of 20243320387 in words is "twenty billion, two hundred forty-three million, three hundred twenty thousand, three hundred eighty-seven".