20223256787 has 2 divisors, whose sum is σ = 20223256788. Its totient is φ = 20223256786.

The previous prime is 20223256777. The next prime is 20223256811. The reversal of 20223256787 is 78765232202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20223256787 - 2⁶ = 20223256723 is a prime.

It is not a weakly prime, because it can be changed into another prime (20223256747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111628393 + 10111628394.

It is an arithmetic number, because the mean of its divisors is an integer number (10111628394).

Almost surely, 2^20223256787 is an apocalyptic number.

20223256787 is a deficient number, since it is larger than the sum of its proper divisors (1).

20223256787 is an equidigital number, since it uses as much as digits as its factorization.

20223256787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 44.

Adding to 20223256787 its reverse (78765232202), we get a palindrome (98988488989).

The spelling of 20223256787 in words is "twenty billion, two hundred twenty-three million, two hundred fifty-six thousand, seven hundred eighty-seven".