20080280 has 64 divisors (see below), whose sum is σ = 50388480. Its totient is φ = 7139200.

The previous prime is 20080253. The next prime is 20080289. The reversal of 20080280 is 8208002.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20080289) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 20195 + ... + 21165.

It is an arithmetic number, because the mean of its divisors is an integer number (787320).

Almost surely, 2^20080280 is an apocalyptic number.

20080280 is a gapful number since it is divisible by the number (20) 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 20080280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25194240).

20080280 is an abundant number, since it is smaller than the sum of its proper divisors (30308200).

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

20080280 is a wasteful number, since it uses less digits than its factorization.

With its successor (20080281) it forms an eRAP, since the sums of their prime factors are consecutive (1040 and 1041).

20080280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040 (or 1036 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 20080280 is about 4481.1025429017. The cubic root of 20080280 is about 271.8044658704.

Adding to 20080280 its reverse (8208002), we get a palindrome (28288282).

The spelling of 20080280 in words is "twenty million, eighty thousand, two hundred eighty".