20853228 has 48 divisors (see below), whose sum is σ = 53383680. Its totient is φ = 6283200.

The previous prime is 20853227. The next prime is 20853229. The reversal of 20853228 is 82235802.

It is an interprime number because it is at equal distance from previous prime (20853227) and next prime (20853229).

It is a junction number, because it is equal to n+sod(n) for n = 20853195 and 20853204.

It is not an unprimeable number, because it can be changed into a prime (20853227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31218 + ... + 31878.

It is an arithmetic number, because the mean of its divisors is an integer number (1112160).

Almost surely, 2^20853228 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 20853228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26691840).

20853228 is an abundant number, since it is smaller than the sum of its proper divisors (32530452).

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

20853228 is a wasteful number, since it uses less digits than its factorization.

20853228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918 (or 916 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 20853228 is about 4566.5334773765. The cubic root of 20853228 is about 275.2481638649.

The spelling of 20853228 in words is "twenty million, eight hundred fifty-three thousand, two hundred twenty-eight".