20323221137 has 2 divisors, whose sum is σ = 20323221138. Its totient is φ = 20323221136.

The previous prime is 20323221067. The next prime is 20323221151. The reversal of 20323221137 is 73112232302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10634559376 + 9688661761 = 103124^2 + 98431^2 .

It is a cyclic number.

It is not a de Polignac number, because 20323221137 - 2¹⁴ = 20323204753 is a prime.

It is not a weakly prime, because it can be changed into another prime (20323221437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10161610568 + 10161610569.

It is an arithmetic number, because the mean of its divisors is an integer number (10161610569).

Almost surely, 2^20323221137 is an apocalyptic number.

It is an amenable number.

20323221137 is a deficient number, since it is larger than the sum of its proper divisors (1).

20323221137 is an equidigital number, since it uses as much as digits as its factorization.

20323221137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 26.

Adding to 20323221137 its reverse (73112232302), we get a palindrome (93435453439).

The spelling of 20323221137 in words is "twenty billion, three hundred twenty-three million, two hundred twenty-one thousand, one hundred thirty-seven".