20362081 has 2 divisors, whose sum is σ = 20362082. Its totient is φ = 20362080.

The previous prime is 20362063. The next prime is 20362087. The reversal of 20362081 is 18026302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19580625 + 781456 = 4425^2 + 884^2 .

It is a cyclic number.

It is not a de Polignac number, because 20362081 - 2⁵ = 20362049 is a prime.

It is a super-3 number, since 3×20362081³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (20362087) 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, 10181040 + 10181041.

It is an arithmetic number, because the mean of its divisors is an integer number (10181041).

Almost surely, 2^20362081 is an apocalyptic number.

It is an amenable number.

20362081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20362081 is an equidigital number, since it uses as much as digits as its factorization.

20362081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20362081 is about 4512.4362599376. The cubic root of 20362081 is about 273.0700397697.

Adding to 20362081 its reverse (18026302), we get a palindrome (38388383).

The spelling of 20362081 in words is "twenty million, three hundred sixty-two thousand, eighty-one".