20323211137 has 2 divisors, whose sum is σ = 20323211138. Its totient is φ = 20323211136.

The previous prime is 20323211101. The next prime is 20323211141. The reversal of 20323211137 is 73111232302.

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., 20322213136 + 998001 = 142556^2 + 999^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20323211137 is a prime.

It is not a weakly prime, because it can be changed into another prime (20323211147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10161605568 + 10161605569.

It is an arithmetic number, because the mean of its divisors is an integer number (10161605569).

Almost surely, 2^20323211137 is an apocalyptic number.

It is an amenable number.

20323211137 is a deficient number, since it is larger than the sum of its proper divisors (1).

20323211137 is an equidigital number, since it uses as much as digits as its factorization.

20323211137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

Adding to 20323211137 its reverse (73111232302), we get a palindrome (93434443439).

It can be divided in two parts, 203232 and 11137, that added together give a square (214369 = 463²).

The spelling of 20323211137 in words is "twenty billion, three hundred twenty-three million, two hundred eleven thousand, one hundred thirty-seven".