20368811 has 2 divisors, whose sum is σ = 20368812. Its totient is φ = 20368810.

The previous prime is 20368793. The next prime is 20368819. The reversal of 20368811 is 11886302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20368811 - 2²² = 16174507 is a prime.

It is not a weakly prime, because it can be changed into another prime (20368819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10184405 + 10184406.

It is an arithmetic number, because the mean of its divisors is an integer number (10184406).

Almost surely, 2^20368811 is an apocalyptic number.

20368811 is a deficient number, since it is larger than the sum of its proper divisors (1).

20368811 is an equidigital number, since it uses as much as digits as its factorization.

20368811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 20368811 is about 4513.1819152345. The cubic root of 20368811 is about 273.1001211570.

The spelling of 20368811 in words is "twenty million, three hundred sixty-eight thousand, eight hundred eleven".