20740271 has 8 divisors (see below), whose sum is σ = 21479424. Its totient is φ = 20005560.

The previous prime is 20740261. The next prime is 20740297. The reversal of 20740271 is 17204702.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20740271 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 (20740201) 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, 10466 + ... + 12288.

It is an arithmetic number, because the mean of its divisors is an integer number (2684928).

Almost surely, 2^20740271 is an apocalyptic number.

20740271 is a deficient number, since it is larger than the sum of its proper divisors (739153).

20740271 is a wasteful number, since it uses less digits than its factorization.

20740271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 20740271 is about 4554.1487678819. The cubic root of 20740271 is about 274.7502790882.

Adding to 20740271 its reverse (17204702), we get a palindrome (37944973).

The spelling of 20740271 in words is "twenty million, seven hundred forty thousand, two hundred seventy-one".