20312300233 has 4 divisors (see below), whose sum is σ = 20318297220. Its totient is φ = 20306303248.

The previous prime is 20312300171. The next prime is 20312300243. The reversal of 20312300233 is 33200321302.

It is a happy number.

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 17978250889 + 2334049344 = 134083^2 + 48312^2 .

It is a cyclic number.

It is not a de Polignac number, because 20312300233 - 2¹³ = 20312292041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20312300233.

It is not an unprimeable number, because it can be changed into a prime (20312300243) 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, 2993410 + ... + 3000187.

It is an arithmetic number, because the mean of its divisors is an integer number (5079574305).

Almost surely, 2^20312300233 is an apocalyptic number.

It is an amenable number.

20312300233 is a deficient number, since it is larger than the sum of its proper divisors (5996987).

20312300233 is an equidigital number, since it uses as much as digits as its factorization.

20312300233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5996986.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 20312300233 its reverse (33200321302), we get a palindrome (53512621535).

The spelling of 20312300233 in words is "twenty billion, three hundred twelve million, three hundred thousand, two hundred thirty-three".