20512271 has 8 divisors (see below), whose sum is σ = 22370880. Its totient is φ = 18693792.

The previous prime is 20512253. The next prime is 20512273. The reversal of 20512271 is 17221502.

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

It is not a de Polignac number, because 20512271 - 2¹⁴ = 20495887 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 (20512273) 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, 8960 + ... + 11013.

It is an arithmetic number, because the mean of its divisors is an integer number (2796360).

Almost surely, 2^20512271 is an apocalyptic number.

20512271 is a deficient number, since it is larger than the sum of its proper divisors (1858609).

20512271 is a wasteful number, since it uses less digits than its factorization.

20512271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20065.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 20512271 is about 4529.0474715993. The cubic root of 20512271 is about 273.7397808296.

Adding to 20512271 its reverse (17221502), we get a palindrome (37733773).

The spelling of 20512271 in words is "twenty million, five hundred twelve thousand, two hundred seventy-one".