20312132233 has 4 divisors (see below), whose sum is σ = 20498482180. Its totient is φ = 20125782288.

The previous prime is 20312132213. The next prime is 20312132273. The reversal of 20312132233 is 33223121302.

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 18630066064 + 1682066169 = 136492^2 + 41013^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20312132233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312132213) 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, 93174810 + ... + 93175027.

It is an arithmetic number, because the mean of its divisors is an integer number (5124620545).

Almost surely, 2^20312132233 is an apocalyptic number.

It is an amenable number.

20312132233 is a deficient number, since it is larger than the sum of its proper divisors (186349947).

20312132233 is a wasteful number, since it uses less digits than its factorization.

20312132233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186349946.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 20312132233 its reverse (33223121302), we get a palindrome (53535253535).

The spelling of 20312132233 in words is "twenty billion, three hundred twelve million, one hundred thirty-two thousand, two hundred thirty-three".