20768887 has 2 divisors, whose sum is σ = 20768888. Its totient is φ = 20768886.

The previous prime is 20768873. The next prime is 20768927. The reversal of 20768887 is 78886702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20768887 - 2¹¹ = 20766839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20768827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10384443 + 10384444.

It is an arithmetic number, because the mean of its divisors is an integer number (10384444).

Almost surely, 2^20768887 is an apocalyptic number.

20768887 is a deficient number, since it is larger than the sum of its proper divisors (1).

20768887 is an equidigital number, since it uses as much as digits as its factorization.

20768887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 301056, while the sum is 46.

The square root of 20768887 is about 4557.2894356185. The cubic root of 20768887 is about 274.8765815334.

The spelling of 20768887 in words is "twenty million, seven hundred sixty-eight thousand, eight hundred eighty-seven".