20283480 has 128 divisors (see below), whose sum is σ = 77299200. Its totient is φ = 4634496.

The previous prime is 20283467. The next prime is 20283491. The reversal of 20283480 is 8438202.

It is a super-2 number, since 2×20283480² = 822839121820800, which contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 6219 + ... + 8901.

It is an arithmetic number, because the mean of its divisors is an integer number (603900).

Almost surely, 2^20283480 is an apocalyptic number.

20283480 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 20283480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38649600).

20283480 is an abundant number, since it is smaller than the sum of its proper divisors (57015720).

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

20283480 is a wasteful number, since it uses less digits than its factorization.

20283480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2710 (or 2700 counting only the distinct ones).

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

The square root of 20283480 is about 4503.7184636698. The cubic root of 20283480 is about 272.7182215178.

The spelling of 20283480 in words is "twenty million, two hundred eighty-three thousand, four hundred eighty".