20412811 has 2 divisors, whose sum is σ = 20412812. Its totient is φ = 20412810.

The previous prime is 20412797. The next prime is 20412817. The reversal of 20412811 is 11821402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20412811 - 2¹¹ = 20410763 is a prime.

It is not a weakly prime, because it can be changed into another prime (20412817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206405 + 10206406.

It is an arithmetic number, because the mean of its divisors is an integer number (10206406).

Almost surely, 2^20412811 is an apocalyptic number.

20412811 is a deficient number, since it is larger than the sum of its proper divisors (1).

20412811 is an equidigital number, since it uses as much as digits as its factorization.

20412811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 20412811 is about 4518.0538952075. The cubic root of 20412811 is about 273.2966268707.

The spelling of 20412811 in words is "twenty million, four hundred twelve thousand, eight hundred eleven".