20863411 has 2 divisors, whose sum is σ = 20863412. Its totient is φ = 20863410.

The previous prime is 20863399. The next prime is 20863429. The reversal of 20863411 is 11436802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20863411 - 2⁹ = 20862899 is a prime.

It is not a weakly prime, because it can be changed into another prime (20863111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10431705 + 10431706.

It is an arithmetic number, because the mean of its divisors is an integer number (10431706).

Almost surely, 2^20863411 is an apocalyptic number.

20863411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20863411 is an equidigital number, since it uses as much as digits as its factorization.

20863411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 20863411 is about 4567.6483008218. The cubic root of 20863411 is about 275.2929594228.

The spelling of 20863411 in words is "twenty million, eight hundred sixty-three thousand, four hundred eleven".