20748228 has 96 divisors (see below), whose sum is σ = 55520640. Its totient is φ = 5990400.

The previous prime is 20748223. The next prime is 20748229. The reversal of 20748228 is 82284702.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20748223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205378 + ... + 205478.

It is an arithmetic number, because the mean of its divisors is an integer number (578340).

Almost surely, 2^20748228 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 20748228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27760320).

20748228 is an abundant number, since it is smaller than the sum of its proper divisors (34772412).

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

20748228 is a wasteful number, since it uses less digits than its factorization.

20748228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 20748228 is about 4555.0222831508. The cubic root of 20748228 is about 274.7854105554.

The spelling of 20748228 in words is "twenty million, seven hundred forty-eight thousand, two hundred twenty-eight".