20994041 has 2 divisors, whose sum is σ = 20994042. Its totient is φ = 20994040.

The previous prime is 20994023. The next prime is 20994047. The reversal of 20994041 is 14049902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20748025 + 246016 = 4555^2 + 496^2 .

It is a cyclic number.

It is not a de Polignac number, because 20994041 - 2⁶ = 20993977 is a prime.

It is equal to p_1329608 and since 20994041 and 1329608 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 20993995 and 20994013.

It is not a weakly prime, because it can be changed into another prime (20994047) 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, 10497020 + 10497021.

It is an arithmetic number, because the mean of its divisors is an integer number (10497021).

Almost surely, 2^20994041 is an apocalyptic number.

It is an amenable number.

20994041 is a deficient number, since it is larger than the sum of its proper divisors (1).

20994041 is an equidigital number, since it uses as much as digits as its factorization.

20994041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 20994041 is about 4581.9254686212. The cubic root of 20994041 is about 275.8663192501.

The spelling of 20994041 in words is "twenty million, nine hundred ninety-four thousand, forty-one".