20841868 has 24 divisors (see below), whose sum is σ = 37900800. Its totient is φ = 10021008.

The previous prime is 20841857. The next prime is 20841869. The reversal of 20841868 is 86814802.

It is not an unprimeable number, because it can be changed into a prime (20841869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10153 + ... + 12031.

It is an arithmetic number, because the mean of its divisors is an integer number (1579200).

Almost surely, 2^20841868 is an apocalyptic number.

It is an amenable number.

20841868 is a deficient number, since it is larger than the sum of its proper divisors (17058932).

20841868 is a wasteful number, since it uses less digits than its factorization.

20841868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989 (or 1987 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 20841868 is about 4565.2894760354. The cubic root of 20841868 is about 275.1981734093.

The spelling of 20841868 in words is "twenty million, eight hundred forty-one thousand, eight hundred sixty-eight".