20131320033 has 24 divisors (see below), whose sum is σ = 31726670976. Its totient is φ = 12199034400.

The previous prime is 20131320029. The next prime is 20131320089. The reversal of 20131320033 is 33002313102.

It is not a de Polignac number, because 20131320033 - 2² = 20131320029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20131319988 and 20131320015.

It is not an unprimeable number, because it can be changed into a prime (20131320533) by changing a digit.

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, 1088443 + ... + 1106783.

It is an arithmetic number, because the mean of its divisors is an integer number (1321944624).

Almost surely, 2^20131320033 is an apocalyptic number.

It is an amenable number.

20131320033 is a deficient number, since it is larger than the sum of its proper divisors (11595350943).

20131320033 is a wasteful number, since it uses less digits than its factorization.

20131320033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29445 (or 29442 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 20131320033 its reverse (33002313102), we get a palindrome (53133633135).

The spelling of 20131320033 in words is "twenty billion, one hundred thirty-one million, three hundred twenty thousand, thirty-three".