21244035 has 16 divisors (see below), whose sum is σ = 34052256. Its totient is φ = 11309568.

The previous prime is 21244001. The next prime is 21244061. The reversal of 21244035 is 53044212.

It is not a de Polignac number, because 21244035 - 2⁷ = 21243907 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11067 + ... + 12843.

It is an arithmetic number, because the mean of its divisors is an integer number (2128266).

Almost surely, 2^21244035 is an apocalyptic number.

21244035 is a deficient number, since it is larger than the sum of its proper divisors (12808221).

21244035 is a wasteful number, since it uses less digits than its factorization.

21244035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 21244035 is about 4609.1251881458. The cubic root of 21244035 is about 276.9569935014.

Adding to 21244035 its reverse (53044212), we get a palindrome (74288247).

The spelling of 21244035 in words is "twenty-one million, two hundred forty-four thousand, thirty-five".