20011303331 has 2 divisors, whose sum is σ = 20011303332. Its totient is φ = 20011303330.

The previous prime is 20011303309. The next prime is 20011303357. The reversal of 20011303331 is 13330311002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20011303331 - 2¹⁴ = 20011286947 is a prime.

It is a super-2 number, since 2×20011303331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20011303831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005651665 + 10005651666.

It is an arithmetic number, because the mean of its divisors is an integer number (10005651666).

Almost surely, 2^20011303331 is an apocalyptic number.

20011303331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011303331 is an equidigital number, since it uses as much as digits as its factorization.

20011303331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 20011303331 its reverse (13330311002), we get a palindrome (33341614333).

The spelling of 20011303331 in words is "twenty billion, eleven million, three hundred three thousand, three hundred thirty-one".