20311200625 has 40 divisors (see below), whose sum is σ = 25824439784. Its totient is φ = 15966720000.

The previous prime is 20311200601. The next prime is 20311200647. The reversal of 20311200625 is 52600211302.

It can be written as a sum of positive squares in 20 ways, for example, as 18783250704 + 1527949921 = 137052^2 + 39089^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20311200625 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20311200596 and 20311200605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15374965 + ... + 15376285.

Almost surely, 2^20311200625 is an apocalyptic number.

20311200625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20311200625 is a deficient number, since it is larger than the sum of its proper divisors (5513239159).

20311200625 is an equidigital number, since it uses as much as digits as its factorization.

20311200625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751 (or 1736 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 20311200625 its reverse (52600211302), we get a palindrome (72911411927).

The spelling of 20311200625 in words is "twenty billion, three hundred eleven million, two hundred thousand, six hundred twenty-five".