20013132320 has 24 divisors (see below), whose sum is σ = 47281025484. Its totient is φ = 8005252864.

The previous prime is 20013132299. The next prime is 20013132367. The reversal of 20013132320 is 2323131002.

It can be written as a sum of positive squares in 2 ways, for example, as 18575509264 + 1437623056 = 136292^2 + 37916^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62540879 + ... + 62541198.

Almost surely, 2^20013132320 is an apocalyptic number.

20013132320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20013132320 is an abundant number, since it is smaller than the sum of its proper divisors (27267893164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20013132320 is a wasteful number, since it uses less digits than its factorization.

20013132320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125082092 (or 125082084 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20013132320 its reverse (2323131002), we get a palindrome (22336263322).

The spelling of 20013132320 in words is "twenty billion, thirteen million, one hundred thirty-two thousand, three hundred twenty".