21114272 has 48 divisors (see below), whose sum is σ = 45246600. Its totient is φ = 9658368.

The previous prime is 21114257. The next prime is 21114283. The reversal of 21114272 is 27241112.

It can be written as a sum of positive squares in 4 ways, for example, as 20106256 + 1008016 = 4484^2 + 1004^2 .

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, 19604 + ... + 20652.

Almost surely, 2^21114272 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 21114272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22623300).

21114272 is an abundant number, since it is smaller than the sum of its proper divisors (24132328).

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

21114272 is a wasteful number, since it uses less digits than its factorization.

21114272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113 (or 1105 counting only the distinct ones).

The product of its digits is 224, while the sum is 20.

The square root of 21114272 is about 4595.0268769617. The cubic root of 21114272 is about 276.3919377337.

Adding to 21114272 its reverse (27241112), we get a palindrome (48355384).

The spelling of 21114272 in words is "twenty-one million, one hundred fourteen thousand, two hundred seventy-two".