20863248 has 80 divisors (see below), whose sum is σ = 63614976. Its totient is φ = 5765760.

The previous prime is 20863247. The next prime is 20863289. The reversal of 20863248 is 84236802.

It is not an unprimeable number, because it can be changed into a prime (20863247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9415 + ... + 11417.

Almost surely, 2^20863248 is an apocalyptic number.

20863248 is a gapful number since it is divisible by the number (28) 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 20863248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31807488).

20863248 is an abundant number, since it is smaller than the sum of its proper divisors (42751728).

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

20863248 is a wasteful number, since it uses less digits than its factorization.

20863248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052 (or 2046 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 20863248 is about 4567.6304579070. The cubic root of 20863248 is about 275.2922424919.

The spelling of 20863248 in words is "twenty million, eight hundred sixty-three thousand, two hundred forty-eight".