21044710 has 32 divisors (see below), whose sum is σ = 39307680. Its totient is φ = 8107008.

The previous prime is 21044687. The next prime is 21044711. The reversal of 21044710 is 1744012.

It is a super-3 number, since 3×21044710³ (a number of 23 digits) contains 333 as substring.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21044711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30934 + ... + 31606.

It is an arithmetic number, because the mean of its divisors is an integer number (1228365).

Almost surely, 2^21044710 is an apocalyptic number.

21044710 is a deficient number, since it is larger than the sum of its proper divisors (18262970).

21044710 is a wasteful number, since it uses less digits than its factorization.

21044710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 21044710 is about 4587.4513621400. The cubic root of 21044710 is about 276.0880748808.

Adding to 21044710 its reverse (1744012), we get a palindrome (22788722).

The spelling of 21044710 in words is "twenty-one million, forty-four thousand, seven hundred ten".