20312330231 has 4 divisors (see below), whose sum is σ = 20320736592. Its totient is φ = 20303923872.

The previous prime is 20312330219. The next prime is 20312330257. The reversal of 20312330231 is 13203321302.

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

It is a cyclic number.

It is not a de Polignac number, because 20312330231 - 2³⁴ = 3132461047 is a prime.

It is a super-2 number, since 2×20312330231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312330261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4199555 + ... + 4204388.

It is an arithmetic number, because the mean of its divisors is an integer number (5080184148).

Almost surely, 2^20312330231 is an apocalyptic number.

20312330231 is a deficient number, since it is larger than the sum of its proper divisors (8406361).

20312330231 is an equidigital number, since it uses as much as digits as its factorization.

20312330231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8406360.

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

Adding to 20312330231 its reverse (13203321302), we get a palindrome (33515651533).

The spelling of 20312330231 in words is "twenty billion, three hundred twelve million, three hundred thirty thousand, two hundred thirty-one".