20320031225 has 24 divisors (see below), whose sum is σ = 27330334080. Its totient is φ = 14897574720.

The previous prime is 20320031203. The next prime is 20320031239. The reversal of 20320031225 is 52213002302.

It is not a de Polignac number, because 20320031225 - 2¹⁰ = 20320030201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20320031197 and 20320031206.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 179729 + ... + 270078.

It is an arithmetic number, because the mean of its divisors is an integer number (1138763920).

Almost surely, 2^20320031225 is an apocalyptic number.

20320031225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20320031225 is a deficient number, since it is larger than the sum of its proper divisors (7010302855).

20320031225 is a wasteful number, since it uses less digits than its factorization.

20320031225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449969 (or 449964 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 20320031225 its reverse (52213002302), we get a palindrome (72533033527).

The spelling of 20320031225 in words is "twenty billion, three hundred twenty million, thirty-one thousand, two hundred twenty-five".