21244314 has 96 divisors (see below), whose sum is σ = 54601344. Its totient is φ = 5391360.

The previous prime is 21244309. The next prime is 21244367. The reversal of 21244314 is 41344212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 290982 + ... + 291054.

It is an arithmetic number, because the mean of its divisors is an integer number (568764).

Almost surely, 2^21244314 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21244314, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27300672).

21244314 is an abundant number, since it is smaller than the sum of its proper divisors (33357030).

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

21244314 is a wasteful number, since it uses less digits than its factorization.

21244314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 139 counting only the distinct ones).

The product of its digits is 768, while the sum is 21.

The square root of 21244314 is about 4609.1554540935. The cubic root of 21244314 is about 276.9582059305.

Adding to 21244314 its reverse (41344212), we get a palindrome (62588526).

The spelling of 21244314 in words is "twenty-one million, two hundred forty-four thousand, three hundred fourteen".