20999112 has 32 divisors (see below), whose sum is σ = 53023680. Its totient is φ = 6929600.

The previous prime is 20999101. The next prime is 20999141. The reversal of 20999112 is 21199902.

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, 1908 + ... + 6755.

It is an arithmetic number, because the mean of its divisors is an integer number (1656990).

Almost surely, 2^20999112 is an apocalyptic number.

It is an amenable number.

20999112 is an abundant number, since it is smaller than the sum of its proper divisors (32024568).

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

20999112 is a wasteful number, since it uses less digits than its factorization.

20999112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8773 (or 8769 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 20999112 is about 4582.4788051883. The cubic root of 20999112 is about 275.8885288140. Note that the first 3 decimals are identical.

It can be divided in two parts, 2099 and 9112, that added together give a palindrome (11211).

The spelling of 20999112 in words is "twenty million, nine hundred ninety-nine thousand, one hundred twelve".