20312302133 has 16 divisors (see below), whose sum is σ = 21277347456. Its totient is φ = 19354230720.

The previous prime is 20312302111. The next prime is 20312302139. The reversal of 20312302133 is 33120321302.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20312302133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312302139) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 13266578 + ... + 13268108.

It is an arithmetic number, because the mean of its divisors is an integer number (1329834216).

Almost surely, 2^20312302133 is an apocalyptic number.

20312302133 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20312302133 is a deficient number, since it is larger than the sum of its proper divisors (965045323).

20312302133 is a wasteful number, since it uses less digits than its factorization.

20312302133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20312302133 its reverse (33120321302), we get a palindrome (53432623435).

The spelling of 20312302133 in words is "twenty billion, three hundred twelve million, three hundred two thousand, one hundred thirty-three".