20322231569 has 2 divisors, whose sum is σ = 20322231570. Its totient is φ = 20322231568.

The previous prime is 20322231499. The next prime is 20322231581. The reversal of 20322231569 is 96513222302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20259821569 + 62410000 = 142337^2 + 7900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20322231569 is a prime.

It is a super-2 number, since 2×20322231569² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20322231599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10161115784 + 10161115785.

It is an arithmetic number, because the mean of its divisors is an integer number (10161115785).

Almost surely, 2^20322231569 is an apocalyptic number.

It is an amenable number.

20322231569 is a deficient number, since it is larger than the sum of its proper divisors (1).

20322231569 is an equidigital number, since it uses as much as digits as its factorization.

20322231569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 20322231569 in words is "twenty billion, three hundred twenty-two million, two hundred thirty-one thousand, five hundred sixty-nine".