20311321130 has 16 divisors (see below), whose sum is σ = 36696295080. Its totient is φ = 8094324672.

The previous prime is 20311321127. The next prime is 20311321133. The reversal of 20311321130 is 3112311302.

It is an interprime number because it is at equal distance from previous prime (20311321127) and next prime (20311321133).

It can be written as a sum of positive squares in 4 ways, for example, as 5009383729 + 15301937401 = 70777^2 + 123701^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20311321099 and 20311321108.

It is not an unprimeable number, because it can be changed into a prime (20311321133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3772649 + ... + 3778028.

Almost surely, 2^20311321130 is an apocalyptic number.

20311321130 is a deficient number, since it is larger than the sum of its proper divisors (16384973950).

20311321130 is a wasteful number, since it uses less digits than its factorization.

20311321130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7550953.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20311321130 its reverse (3112311302), we get a palindrome (23423632432).

The spelling of 20311321130 in words is "twenty billion, three hundred eleven million, three hundred twenty-one thousand, one hundred thirty".