20785248 has 132 divisors (see below), whose sum is σ = 66961188. Its totient is φ = 6298560.

The previous prime is 20785241. The next prime is 20785253. The reversal of 20785248 is 84258702.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (132).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20785241) by changing a digit.

It is a polite number, since it can be written in 21 ways as a sum of consecutive naturals, for example, 1889563 + ... + 1889573.

Almost surely, 2^20785248 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 20785248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33480594).

20785248 is an abundant number, since it is smaller than the sum of its proper divisors (46175940).

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

20785248 is an frugal number, since it uses more digits than its factorization.

20785248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51 (or 16 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 20785248 is about 4559.0841185484. The cubic root of 20785248 is about 274.9487419616.

The spelling of 20785248 in words is "twenty million, seven hundred eighty-five thousand, two hundred forty-eight".