20247271 has 8 divisors (see below), whose sum is σ = 22558464. Its totient is φ = 18014520.

The previous prime is 20247263. The next prime is 20247301. The reversal of 20247271 is 17274202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20247271 - 2³ = 20247263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20247211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19065 + ... + 20098.

It is an arithmetic number, because the mean of its divisors is an integer number (2819808).

Almost surely, 2^20247271 is an apocalyptic number.

20247271 is a deficient number, since it is larger than the sum of its proper divisors (2311193).

20247271 is a wasteful number, since it uses less digits than its factorization.

20247271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39221.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 20247271 is about 4499.6967675611. The cubic root of 20247271 is about 272.5558441227. Note that the first 3 decimals are identical.

The spelling of 20247271 in words is "twenty million, two hundred forty-seven thousand, two hundred seventy-one".