20012320033 has 4 divisors (see below), whose sum is σ = 20882420928. Its totient is φ = 19142219140.

The previous prime is 20012319989. The next prime is 20012320037. The reversal of 20012320033 is 33002321002.

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 20012320033 - 2²⁹ = 19475449121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012319989 and 20012320016.

It is not an unprimeable number, because it can be changed into a prime (20012320037) 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, 435050413 + ... + 435050458.

It is an arithmetic number, because the mean of its divisors is an integer number (5220605232).

Almost surely, 2^20012320033 is an apocalyptic number.

20012320033 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20012320033 is a deficient number, since it is larger than the sum of its proper divisors (870100895).

20012320033 is an equidigital number, since it uses as much as digits as its factorization.

20012320033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870100894.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 20012320033 its reverse (33002321002), we get a palindrome (53014641035).

The spelling of 20012320033 in words is "twenty billion, twelve million, three hundred twenty thousand, thirty-three".