20995227 has 32 divisors (see below), whose sum is σ = 34191360. Its totient is φ = 12627360.

The previous prime is 20995213. The next prime is 20995231. The reversal of 20995227 is 72259902.

It is not a de Polignac number, because 20995227 - 2¹¹ = 20993179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20995191 and 20995200.

It is not an unprimeable number, because it can be changed into a prime (20995207) 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 31 ways as a sum of consecutive naturals, for example, 66073 + ... + 66389.

It is an arithmetic number, because the mean of its divisors is an integer number (1068480).

Almost surely, 2^20995227 is an apocalyptic number.

20995227 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20995227 is a deficient number, since it is larger than the sum of its proper divisors (13196133).

20995227 is a wasteful number, since it uses less digits than its factorization.

20995227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 20995227 is about 4582.0548883661. The cubic root of 20995227 is about 275.8715139193.

The spelling of 20995227 in words is "twenty million, nine hundred ninety-five thousand, two hundred twenty-seven".