20412149 has 2 divisors, whose sum is σ = 20412150. Its totient is φ = 20412148.

The previous prime is 20412113. The next prime is 20412151. The reversal of 20412149 is 94121402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12888100 + 7524049 = 3590^2 + 2743^2 .

It is a cyclic number.

It is not a de Polignac number, because 20412149 - 2⁸ = 20411893 is a prime.

It is a Sophie Germain prime.

Together with 20412151, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20412169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206074 + 10206075.

It is an arithmetic number, because the mean of its divisors is an integer number (10206075).

Almost surely, 2^20412149 is an apocalyptic number.

It is an amenable number.

20412149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20412149 is an equidigital number, since it uses as much as digits as its factorization.

20412149 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 23.

The square root of 20412149 is about 4517.9806329820. The cubic root of 20412149 is about 273.2936724463.

The spelling of 20412149 in words is "twenty million, four hundred twelve thousand, one hundred forty-nine".