20501248 has 36 divisors (see below), whose sum is σ = 41722128. Its totient is φ = 10050560.

The previous prime is 20501237. The next prime is 20501267. The reversal of 20501248 is 84210502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12813 + ... + 14323.

It is an arithmetic number, because the mean of its divisors is an integer number (1158948).

Almost surely, 2^20501248 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 20501248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20861064).

20501248 is an abundant number, since it is smaller than the sum of its proper divisors (21220880).

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

20501248 is an equidigital number, since it uses as much as digits as its factorization.

20501248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580 (or 1566 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 20501248 is about 4527.8303855158. The cubic root of 20501248 is about 273.6907374339.

The spelling of 20501248 in words is "twenty million, five hundred one thousand, two hundred forty-eight".