20247272 has 32 divisors (see below), whose sum is σ = 40969800. Its totient is φ = 9348352.

The previous prime is 20247263. The next prime is 20247301. The reversal of 20247272 is 27274202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18541636 + 1705636 = 4306^2 + 1306^2 .

20247272 is a modest number, since divided by 7272 gives 2024 as remainder.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381998 + ... + 382050.

Almost surely, 2^20247272 is an apocalyptic number.

It is an amenable number.

20247272 is an abundant number, since it is smaller than the sum of its proper divisors (20722528).

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

20247272 is an frugal number, since it uses more digits than its factorization.

20247272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 20247272 is about 4499.6968786797. The cubic root of 20247272 is about 272.5558486098. Note that the first 3 decimals are identical.

It can be divided in two parts, 202 and 47272, that added together give a palindrome (47474).

The spelling of 20247272 in words is "twenty million, two hundred forty-seven thousand, two hundred seventy-two".