20828271 has 16 divisors (see below), whose sum is σ = 29352960. Its totient is φ = 13110240.

The previous prime is 20828257. The next prime is 20828279. The reversal of 20828271 is 17282802.

It is a happy number.

It is not a de Polignac number, because 20828271 - 2¹⁷ = 20697199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20828279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3541 + ... + 7361.

It is an arithmetic number, because the mean of its divisors is an integer number (1834560).

Almost surely, 2^20828271 is an apocalyptic number.

20828271 is a deficient number, since it is larger than the sum of its proper divisors (8524689).

20828271 is a wasteful number, since it uses less digits than its factorization.

20828271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3926.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 20828271 is about 4563.8000613524. The cubic root of 20828271 is about 275.1383149939.

The spelling of 20828271 in words is "twenty million, eight hundred twenty-eight thousand, two hundred seventy-one".