20147271 has 8 divisors (see below), whose sum is σ = 26907504. Its totient is φ = 13409280.

The previous prime is 20147251. The next prime is 20147273. The reversal of 20147271 is 17274102.

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

It is not a de Polignac number, because 20147271 - 2⁶ = 20147207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20147273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3316 + ... + 7161.

It is an arithmetic number, because the mean of its divisors is an integer number (3363438).

Almost surely, 2^20147271 is an apocalyptic number.

20147271 is a deficient number, since it is larger than the sum of its proper divisors (6760233).

20147271 is a wasteful number, since it uses less digits than its factorization.

20147271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11121.

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 20147271 is about 4488.5711534964. The cubic root of 20147271 is about 272.1063913026.

The spelling of 20147271 in words is "twenty million, one hundred forty-seven thousand, two hundred seventy-one".