20567868 has 12 divisors (see below), whose sum is σ = 47991720. Its totient is φ = 6855952.

The previous prime is 20567867. The next prime is 20567891. The reversal of 20567868 is 86876502.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20567867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 856983 + ... + 857006.

It is an arithmetic number, because the mean of its divisors is an integer number (3999310).

Almost surely, 2^20567868 is an apocalyptic number.

It is an amenable number.

20567868 is an abundant number, since it is smaller than the sum of its proper divisors (27423852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20567868 is a wasteful number, since it uses less digits than its factorization.

20567868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713996 (or 1713994 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 20567868 is about 4535.1811430195. The cubic root of 20567868 is about 273.9868748930.

The spelling of 20567868 in words is "twenty million, five hundred sixty-seven thousand, eight hundred sixty-eight".