20312333133 has 4 divisors (see below), whose sum is σ = 27083110848. Its totient is φ = 13541555420.

The previous prime is 20312333047. The next prime is 20312333177. The reversal of 20312333133 is 33133321302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20312333133 - 2⁸ = 20312332877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312333333) 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, 3385388853 + ... + 3385388858.

It is an arithmetic number, because the mean of its divisors is an integer number (6770777712).

Almost surely, 2^20312333133 is an apocalyptic number.

It is an amenable number.

20312333133 is a deficient number, since it is larger than the sum of its proper divisors (6770777715).

20312333133 is an equidigital number, since it uses as much as digits as its factorization.

20312333133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6770777714.

The product of its (nonzero) digits is 2916, while the sum is 24.

Adding to 20312333133 its reverse (33133321302), we get a palindrome (53445654435).

The spelling of 20312333133 in words is "twenty billion, three hundred twelve million, three hundred thirty-three thousand, one hundred thirty-three".