20061331 has 2 divisors, whose sum is σ = 20061332. Its totient is φ = 20061330.

The previous prime is 20061319. The next prime is 20061367. The reversal of 20061331 is 13316002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20061331 - 2¹⁵ = 20028563 is a prime.

It is a super-2 number, since 2×20061331² = 804914002983122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20061311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10030665 + 10030666.

It is an arithmetic number, because the mean of its divisors is an integer number (10030666).

Almost surely, 2^20061331 is an apocalyptic number.

20061331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20061331 is an equidigital number, since it uses as much as digits as its factorization.

20061331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 20061331 is about 4478.9877204565. The cubic root of 20061331 is about 271.7189417681.

Adding to 20061331 its reverse (13316002), we get a palindrome (33377333).

The spelling of 20061331 in words is "twenty million, sixty-one thousand, three hundred thirty-one".