20223256747 has 2 divisors, whose sum is σ = 20223256748. Its totient is φ = 20223256746.

The previous prime is 20223256741. The next prime is 20223256777. The reversal of 20223256747 is 74765232202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20223256747 is a prime.

It is a super-2 number, since 2×20223256747² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20223256741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111628373 + 10111628374.

It is an arithmetic number, because the mean of its divisors is an integer number (10111628374).

Almost surely, 2^20223256747 is an apocalyptic number.

20223256747 is a deficient number, since it is larger than the sum of its proper divisors (1).

20223256747 is an equidigital number, since it uses as much as digits as its factorization.

20223256747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 40.

Adding to 20223256747 its reverse (74765232202), we get a palindrome (94988488949).

The spelling of 20223256747 in words is "twenty billion, two hundred twenty-three million, two hundred fifty-six thousand, seven hundred forty-seven".