20632811 has 2 divisors, whose sum is σ = 20632812. Its totient is φ = 20632810.

The previous prime is 20632753. The next prime is 20632853. The reversal of 20632811 is 11823602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20632811 is a prime.

It is not a weakly prime, because it can be changed into another prime (20632861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10316405 + 10316406.

It is an arithmetic number, because the mean of its divisors is an integer number (10316406).

Almost surely, 2^20632811 is an apocalyptic number.

20632811 is a deficient number, since it is larger than the sum of its proper divisors (1).

20632811 is an equidigital number, since it uses as much as digits as its factorization.

20632811 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 20632811 is about 4542.3354125384. The cubic root of 20632811 is about 274.2749429080.

The spelling of 20632811 in words is "twenty million, six hundred thirty-two thousand, eight hundred eleven".