20483280 has 200 divisors, whose sum is σ = 74269800. Its totient is φ = 5225472.

The previous prime is 20483279. The next prime is 20483293. The reversal of 20483280 is 8238402.

It can be written as a sum of positive squares in 4 ways, for example, as 3640464 + 16842816 = 1908^2 + 4104^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 187866 + ... + 187974.

It is an arithmetic number, because the mean of its divisors is an integer number (371349).

Almost surely, 2^20483280 is an apocalyptic number.

20483280 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 20483280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37134900).

20483280 is an abundant number, since it is smaller than the sum of its proper divisors (53786520).

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

20483280 is a wasteful number, since it uses less digits than its factorization.

20483280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 20483280 is about 4525.8457773106. The cubic root of 20483280 is about 273.6107567331.

The spelling of 20483280 in words is "twenty million, four hundred eighty-three thousand, two hundred eighty".