20866048 has 88 divisors (see below), whose sum is σ = 49521024. Its totient is φ = 8601600.

The previous prime is 20866031. The next prime is 20866057. The reversal of 20866048 is 84066802.

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, 293853 + ... + 293923.

Almost surely, 2^20866048 is an apocalyptic number.

20866048 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 20866048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24760512).

20866048 is an abundant number, since it is smaller than the sum of its proper divisors (28654976).

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

20866048 is an equidigital number, since it uses as much as digits as its factorization.

20866048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 20866048 is about 4567.9369522794. The cubic root of 20866048 is about 275.3045573498.

The spelling of 20866048 in words is "twenty million, eight hundred sixty-six thousand, forty-eight".