21940112 has 20 divisors (see below), whose sum is σ = 43659036. Its totient is φ = 10673280.

The previous prime is 21940111. The next prime is 21940151. The reversal of 21940112 is 21104912.

It can be written as a sum of positive squares in 2 ways, for example, as 19678096 + 2262016 = 4436^2 + 1504^2 .

It is not an unprimeable number, because it can be changed into a prime (21940111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17939 + ... + 19122.

Almost surely, 2^21940112 is an apocalyptic number.

It is an amenable number.

21940112 is a deficient number, since it is larger than the sum of its proper divisors (21718924).

21940112 is a wasteful number, since it uses less digits than its factorization.

21940112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37106 (or 37100 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 21940112 is about 4684.0273269912. The cubic root of 21940112 is about 279.9494466556.

The spelling of 21940112 in words is "twenty-one million, nine hundred forty thousand, one hundred twelve".