20131313033 has 4 divisors (see below), whose sum is σ = 21679875588. Its totient is φ = 18582750480.

The previous prime is 20131312997. The next prime is 20131313047. The reversal of 20131313033 is 33031313102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1061912569 + 19069400464 = 32587^2 + 138092^2 .

It is a cyclic number.

It is not a de Polignac number, because 20131313033 - 2⁶ = 20131312969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20131312996 and 20131313014.

It is not an unprimeable number, because it can be changed into a prime (20131313833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774281258 + ... + 774281283.

It is an arithmetic number, because the mean of its divisors is an integer number (5419968897).

Almost surely, 2^20131313033 is an apocalyptic number.

It is an amenable number.

20131313033 is a deficient number, since it is larger than the sum of its proper divisors (1548562555).

20131313033 is a wasteful number, since it uses less digits than its factorization.

20131313033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548562554.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 20131313033 its reverse (33031313102), we get a palindrome (53162626135).

The spelling of 20131313033 in words is "twenty billion, one hundred thirty-one million, three hundred thirteen thousand, thirty-three".