20280250 has 32 divisors (see below), whose sum is σ = 39626496. Its totient is φ = 7757200.

The previous prime is 20280229. The next prime is 20280259. The reversal of 20280250 is 5208202.

It is a super-2 number, since 2×20280250² = 822577080125000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20280259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3987 + ... + 7513.

It is an arithmetic number, because the mean of its divisors is an integer number (1238328).

Almost surely, 2^20280250 is an apocalyptic number.

20280250 is a deficient number, since it is larger than the sum of its proper divisors (19346246).

20280250 is a wasteful number, since it uses less digits than its factorization.

20280250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567 (or 3557 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 20280250 is about 4503.3598568180. The cubic root of 20280250 is about 272.7037446033.

Adding to 20280250 its reverse (5208202), we get a palindrome (25488452).

The spelling of 20280250 in words is "twenty million, two hundred eighty thousand, two hundred fifty".