20312312033 has 8 divisors (see below), whose sum is σ = 22138350528. Its totient is φ = 18523923984.

The previous prime is 20312312017. The next prime is 20312312047. The reversal of 20312312033 is 33021321302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20312312033 - 2⁴ = 20312312017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20312311996 and 20312312014.

It is not an unprimeable number, because it can be changed into a prime (20312312533) 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 7 ways as a sum of consecutive naturals, for example, 9411485 + ... + 9413642.

It is an arithmetic number, because the mean of its divisors is an integer number (2767293816).

Almost surely, 2^20312312033 is an apocalyptic number.

It is an amenable number.

20312312033 is a deficient number, since it is larger than the sum of its proper divisors (1826038495).

20312312033 is a wasteful number, since it uses less digits than its factorization.

20312312033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18825223.

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

Adding to 20312312033 its reverse (33021321302), we get a palindrome (53333633335).

The spelling of 20312312033 in words is "twenty billion, three hundred twelve million, three hundred twelve thousand, thirty-three".