20732272 has 20 divisors (see below), whose sum is σ = 43820856. Its totient is φ = 9423680.

The previous prime is 20732263. The next prime is 20732281. The reversal of 20732272 is 27223702.

It is an interprime number because it is at equal distance from previous prime (20732263) and next prime (20732281).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58723 + ... + 59074.

Almost surely, 2^20732272 is an apocalyptic number.

20732272 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20732272 is an abundant number, since it is smaller than the sum of its proper divisors (23088584).

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

20732272 is a wasteful number, since it uses less digits than its factorization.

20732272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117816 (or 117810 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 20732272 is about 4553.2704729678. The cubic root of 20732272 is about 274.7149531261.

Adding to 20732272 its reverse (27223702), we get a palindrome (47955974).

The spelling of 20732272 in words is "twenty million, seven hundred thirty-two thousand, two hundred seventy-two".