20017272 has 96 divisors (see below), whose sum is σ = 56402640. Its totient is φ = 5913600.

The previous prime is 20017247. The next prime is 20017301. The reversal of 20017272 is 27271002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177088 + ... + 177200.

Almost surely, 2^20017272 is an apocalyptic number.

20017272 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20017272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28201320).

20017272 is an abundant number, since it is smaller than the sum of its proper divisors (36385368).

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

20017272 is a wasteful number, since it uses less digits than its factorization.

20017272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 20017272 is about 4474.0666065672. The cubic root of 20017272 is about 271.5198782118.

Adding to 20017272 its reverse (27271002), we get a palindrome (47288274).

The spelling of 20017272 in words is "twenty million, seventeen thousand, two hundred seventy-two".