21044935 has 8 divisors (see below), whose sum is σ = 25284096. Its totient is φ = 16815840.

The previous prime is 21044927. The next prime is 21044987. The reversal of 21044935 is 53944012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21044935 - 2³ = 21044927 is a prime.

It is a Duffinian number.

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, 3322 + ... + 7288.

It is an arithmetic number, because the mean of its divisors is an integer number (3160512).

Almost surely, 2^21044935 is an apocalyptic number.

21044935 is a deficient number, since it is larger than the sum of its proper divisors (4239161).

21044935 is a wasteful number, since it uses less digits than its factorization.

21044935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5033.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 21044935 is about 4587.4758854952. The cubic root of 21044935 is about 276.0890588113.

Adding to 21044935 its reverse (53944012), we get a palindrome (74988947).

The spelling of 21044935 in words is "twenty-one million, forty-four thousand, nine hundred thirty-five".