20783248 has 40 divisors (see below), whose sum is σ = 43088760. Its totient is φ = 9676800.

The previous prime is 20783239. The next prime is 20783267. The reversal of 20783248 is 84238702.

It can be written as a sum of positive squares in 4 ways, for example, as 11614464 + 9168784 = 3408^2 + 3028^2 .

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29298 + ... + 29998.

It is an arithmetic number, because the mean of its divisors is an integer number (1077219).

Almost surely, 2^20783248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20783248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21544380).

20783248 is an abundant number, since it is smaller than the sum of its proper divisors (22305512).

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

20783248 is a wasteful number, since it uses less digits than its factorization.

20783248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835 (or 829 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 20783248 is about 4558.8647709709. The cubic root of 20783248 is about 274.9399229646.

The spelling of 20783248 in words is "twenty million, seven hundred eighty-three thousand, two hundred forty-eight".