21444302 has 16 divisors (see below), whose sum is σ = 35164800. Its totient is φ = 9726840.

The previous prime is 21444299. The next prime is 21444323. The reversal of 21444302 is 20344412.

It is a congruent 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, 15599 + ... + 16917.

It is an arithmetic number, because the mean of its divisors is an integer number (2197800).

Almost surely, 2^21444302 is an apocalyptic number.

21444302 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21444302 is a deficient number, since it is larger than the sum of its proper divisors (13720498).

21444302 is a wasteful number, since it uses less digits than its factorization.

21444302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 21444302 is about 4630.7992830612. The cubic root of 21444302 is about 277.8245619452.

Adding to 21444302 its reverse (20344412), we get a palindrome (41788714).

It can be divided in two parts, 2144 and 4302, that added together give a palindrome (6446).

The spelling of 21444302 in words is "twenty-one million, four hundred forty-four thousand, three hundred two".