20482440 has 128 divisors (see below), whose sum is σ = 68428800. Its totient is φ = 4862720.

The previous prime is 20482391. The next prime is 20482463. The reversal of 20482440 is 4428402.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20482440.

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, 77749 + ... + 78011.

It is an arithmetic number, because the mean of its divisors is an integer number (534600).

Almost surely, 2^20482440 is an apocalyptic number.

20482440 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 20482440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34214400).

20482440 is an abundant number, since it is smaller than the sum of its proper divisors (47946360).

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

20482440 is a wasteful number, since it uses less digits than its factorization.

20482440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347 (or 343 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 20482440 is about 4525.7529760251. The cubic root of 20482440 is about 273.6070165090.

The spelling of 20482440 in words is "twenty million, four hundred eighty-two thousand, four hundred forty".