20868267 has 12 divisors (see below), whose sum is σ = 32367336. Its totient is φ = 11924640.

The previous prime is 20868257. The next prime is 20868269. The reversal of 20868267 is 76286802.

It is not a de Polignac number, because 20868267 - 2⁸ = 20868011 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20868269) 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, 70834 + ... + 71127.

It is an arithmetic number, because the mean of its divisors is an integer number (2697278).

Almost surely, 2^20868267 is an apocalyptic number.

20868267 is a deficient number, since it is larger than the sum of its proper divisors (11499069).

20868267 is a wasteful number, since it uses less digits than its factorization.

20868267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141978 (or 141971 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 20868267 is about 4568.1798344636. The cubic root of 20868267 is about 275.3143160921.

The spelling of 20868267 in words is "twenty million, eight hundred sixty-eight thousand, two hundred sixty-seven".