20271132 has 72 divisors (see below), whose sum is σ = 58976736. Its totient is φ = 5750784.

The previous prime is 20271131. The next prime is 20271187. The reversal of 20271132 is 23117202.

It is a super-2 number, since 2×20271132² = 821837585122848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20271131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64608 + ... + 64920.

Almost surely, 2^20271132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20271132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29488368).

20271132 is an abundant number, since it is smaller than the sum of its proper divisors (38705604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20271132 is a wasteful number, since it uses less digits than its factorization.

20271132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 20271132 is about 4502.3473877523. The cubic root of 20271132 is about 272.6628692774.

Adding to 20271132 its reverse (23117202), we get a palindrome (43388334).

The spelling of 20271132 in words is "twenty million, two hundred seventy-one thousand, one hundred thirty-two".