20914081 has 2 divisors, whose sum is σ = 20914082. Its totient is φ = 20914080.

The previous prime is 20914051. The next prime is 20914093. The reversal of 20914081 is 18041902.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20784481 + 129600 = 4559^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 20914081 - 2⁹ = 20913569 is a prime.

It is a super-2 number, since 2×20914081² = 874797568149122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20914001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10457040 + 10457041.

It is an arithmetic number, because the mean of its divisors is an integer number (10457041).

Almost surely, 2^20914081 is an apocalyptic number.

It is an amenable number.

20914081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20914081 is an equidigital number, since it uses as much as digits as its factorization.

20914081 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 25.

The square root of 20914081 is about 4573.1915551396. The cubic root of 20914081 is about 275.5156429996.

Adding to 20914081 its reverse (18041902), we get a palindrome (38955983).

The spelling of 20914081 in words is "twenty million, nine hundred fourteen thousand, eighty-one".