20287268 has 36 divisors (see below), whose sum is σ = 38072832. Its totient is φ = 9444720.

The previous prime is 20287261. The next prime is 20287277. The reversal of 20287268 is 86278202.

It is not an unprimeable number, because it can be changed into a prime (20287261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 343823 + ... + 343881.

Almost surely, 2^20287268 is an apocalyptic number.

It is an amenable number.

20287268 is a deficient number, since it is larger than the sum of its proper divisors (17785564).

20287268 is a wasteful number, since it uses less digits than its factorization.

20287268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 20287268 is about 4504.1389854222. The cubic root of 20287268 is about 272.7351974398.

The spelling of 20287268 in words is "twenty million, two hundred eighty-seven thousand, two hundred sixty-eight".