20732271 has 8 divisors (see below), whose sum is σ = 31592064. Its totient is φ = 11847000.

The previous prime is 20732263. The next prime is 20732281. The reversal of 20732271 is 17223702.

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

It is not a de Polignac number, because 20732271 - 2³ = 20732263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20732221) 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, 493605 + ... + 493646.

It is an arithmetic number, because the mean of its divisors is an integer number (3949008).

Almost surely, 2^20732271 is an apocalyptic number.

20732271 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20732271 is a deficient number, since it is larger than the sum of its proper divisors (10859793).

20732271 is an equidigital number, since it uses as much as digits as its factorization.

20732271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987261.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 20732271 is about 4553.2703631566. The cubic root of 20732271 is about 274.7149487093.

Adding to 20732271 its reverse (17223702), we get a palindrome (37955973).

The spelling of 20732271 in words is "twenty million, seven hundred thirty-two thousand, two hundred seventy-one".