20331333305 has 4 divisors (see below), whose sum is σ = 24397599972. Its totient is φ = 16265066640.

The previous prime is 20331333293. The next prime is 20331333307. The reversal of 20331333305 is 50333313302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50333313302 = 2 ⋅25166656651.

It can be written as a sum of positive squares in 2 ways, for example, as 8466024121 + 11865309184 = 92011^2 + 108928^2 .

It is not a de Polignac number, because 20331333305 - 2¹² = 20331329209 is a prime.

It is a super-2 number, since 2×20331333305² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20331333307) 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, 2033133326 + ... + 2033133335.

It is an arithmetic number, because the mean of its divisors is an integer number (6099399993).

Almost surely, 2^20331333305 is an apocalyptic number.

It is an amenable number.

20331333305 is a deficient number, since it is larger than the sum of its proper divisors (4066266667).

20331333305 is an equidigital number, since it uses as much as digits as its factorization.

20331333305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4066266666.

The product of its (nonzero) digits is 7290, while the sum is 26.

Adding to 20331333305 its reverse (50333313302), we get a palindrome (70664646607).

The spelling of 20331333305 in words is "twenty billion, three hundred thirty-one million, three hundred thirty-three thousand, three hundred five".