20243062391 has 2 divisors, whose sum is σ = 20243062392. Its totient is φ = 20243062390.

The previous prime is 20243062363. The next prime is 20243062423. The reversal of 20243062391 is 19326034202.

It is an a-pointer prime, because the next prime (20243062423) can be obtained adding 20243062391 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20243062391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20243062361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10121531195 + 10121531196.

It is an arithmetic number, because the mean of its divisors is an integer number (10121531196).

Almost surely, 2^20243062391 is an apocalyptic number.

20243062391 is a deficient number, since it is larger than the sum of its proper divisors (1).

20243062391 is an equidigital number, since it uses as much as digits as its factorization.

20243062391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

Adding to 20243062391 its reverse (19326034202), we get a palindrome (39569096593).

The spelling of 20243062391 in words is "twenty billion, two hundred forty-three million, sixty-two thousand, three hundred ninety-one".