20858112 has 108 divisors (see below), whose sum is σ = 65685984. Its totient is φ = 6312960.

The previous prime is 20858111. The next prime is 20858119. The reversal of 20858112 is 21185802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20858111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24933 + ... + 25755.

Almost surely, 2^20858112 is an apocalyptic number.

20858112 is a gapful number since it is divisible by the number (22) 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 20858112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32842992).

20858112 is an abundant number, since it is smaller than the sum of its proper divisors (44827872).

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

20858112 is a wasteful number, since it uses less digits than its factorization.

20858112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856 (or 839 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 20858112 is about 4567.0682061909. The cubic root of 20858112 is about 275.2696506597.

The spelling of 20858112 in words is "twenty million, eight hundred fifty-eight thousand, one hundred twelve".