20252280 has 32 divisors (see below), whose sum is σ = 60757200. Its totient is φ = 5400576.

The previous prime is 20252279. The next prime is 20252293. The reversal of 20252280 is 8225202.

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 7 ways as a sum of consecutive naturals, for example, 84265 + ... + 84504.

Almost surely, 2^20252280 is an apocalyptic number.

20252280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20252280 is an abundant number, since it is smaller than the sum of its proper divisors (40504920).

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

20252280 is a wasteful number, since it uses less digits than its factorization.

20252280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168783 (or 168779 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 20252280 is about 4500.2533262029. The cubic root of 20252280 is about 272.5783182568.

Adding to 20252280 its reverse (8225202), we get a palindrome (28477482).

The spelling of 20252280 in words is "twenty million, two hundred fifty-two thousand, two hundred eighty".