20851112 has 32 divisors (see below), whose sum is σ = 41731200. Its totient is φ = 9732864.

The previous prime is 20851109. The next prime is 20851211. The reversal of 20851112 is 21115802.

It is a happy number.

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, 18353 + ... + 19455.

It is an arithmetic number, because the mean of its divisors is an integer number (1304100).

Almost surely, 2^20851112 is an apocalyptic number.

It is an amenable number.

20851112 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

20851112 is a wasteful number, since it uses less digits than its factorization.

20851112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265 (or 1261 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 20851112 is about 4566.3017859095. The cubic root of 20851112 is about 275.2388536386.

Adding to 20851112 its reverse (21115802), we get a palindrome (41966914).

The spelling of 20851112 in words is "twenty million, eight hundred fifty-one thousand, one hundred twelve".