20605868 has 12 divisors (see below), whose sum is σ = 36671880. Its totient is φ = 10128192.

The previous prime is 20605867. The next prime is 20605873. The reversal of 20605868 is 86850602.

It is not an unprimeable number, because it can be changed into a prime (20605867) 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, 43421 + ... + 43892.

It is an arithmetic number, because the mean of its divisors is an integer number (3055990).

Almost surely, 2^20605868 is an apocalyptic number.

It is an amenable number.

20605868 is a deficient number, since it is larger than the sum of its proper divisors (16066012).

20605868 is a wasteful number, since it uses less digits than its factorization.

20605868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87376 (or 87374 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 20605868 is about 4539.3686785719. The cubic root of 20605868 is about 274.1555051714.

The spelling of 20605868 in words is "twenty million, six hundred five thousand, eight hundred sixty-eight".