20275272 has 80 divisors (see below), whose sum is σ = 57760560. Its totient is φ = 6643296.

The previous prime is 20275267. The next prime is 20275289. The reversal of 20275272 is 27257202.

It is a happy number.

It is a super-2 number, since 2×20275272² = 822173309347968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 43183 + ... + 43649.

It is an arithmetic number, because the mean of its divisors is an integer number (722007).

Almost surely, 2^20275272 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 20275272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28880280).

20275272 is an abundant number, since it is smaller than the sum of its proper divisors (37485288).

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

20275272 is a wasteful number, since it uses less digits than its factorization.

20275272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 20275272 is about 4502.8071244503. The cubic root of 20275272 is about 272.6814301129.

The spelling of 20275272 in words is "twenty million, two hundred seventy-five thousand, two hundred seventy-two".