20325145331 has 2 divisors, whose sum is σ = 20325145332. Its totient is φ = 20325145330.

The previous prime is 20325145289. The next prime is 20325145343. The reversal of 20325145331 is 13354152302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20325145331 is a prime.

It is a super-2 number, since 2×20325145331² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 20325145294 and 20325145303.

It is not a weakly prime, because it can be changed into another prime (20325145031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10162572665 + 10162572666.

It is an arithmetic number, because the mean of its divisors is an integer number (10162572666).

Almost surely, 2^20325145331 is an apocalyptic number.

20325145331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20325145331 is an equidigital number, since it uses as much as digits as its factorization.

20325145331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 20325145331 its reverse (13354152302), we get a palindrome (33679297633).

The spelling of 20325145331 in words is "twenty billion, three hundred twenty-five million, one hundred forty-five thousand, three hundred thirty-one".