20271267 has 12 divisors (see below), whose sum is σ = 29357640. Its totient is φ = 13478688.

The previous prime is 20271239. The next prime is 20271289. The reversal of 20271267 is 76217202.

It is not a de Polignac number, because 20271267 - 2²⁰ = 19222691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20271267.

It is not an unprimeable number, because it can be changed into a prime (20271367) 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 11 ways as a sum of consecutive naturals, for example, 928 + ... + 6434.

It is an arithmetic number, because the mean of its divisors is an integer number (2446470).

Almost surely, 2^20271267 is an apocalyptic number.

20271267 is a deficient number, since it is larger than the sum of its proper divisors (9086373).

20271267 is a wasteful number, since it uses less digits than its factorization.

20271267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5922 (or 5919 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 20271267 is about 4502.3623799068. The cubic root of 20271267 is about 272.6634745619.

Adding to 20271267 its reverse (76217202), we get a palindrome (96488469).

The spelling of 20271267 in words is "twenty million, two hundred seventy-one thousand, two hundred sixty-seven".