21041310 has 16 divisors (see below), whose sum is σ = 50499216. Its totient is φ = 5611008.

The previous prime is 21041309. The next prime is 21041353. The reversal of 21041310 is 1314012.

It is a happy number.

It is a super-2 number, since 2×21041310² = 885473453032200, which contains 22 as substring.

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, 350659 + ... + 350718.

It is an arithmetic number, because the mean of its divisors is an integer number (3156201).

Almost surely, 2^21041310 is an apocalyptic number.

21041310 is an abundant number, since it is smaller than the sum of its proper divisors (29457906).

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

21041310 is a wasteful number, since it uses less digits than its factorization.

21041310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701387.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 21041310 is about 4587.0807710351. The cubic root of 21041310 is about 276.0732057441.

Adding to 21041310 its reverse (1314012), we get a palindrome (22355322).

The spelling of 21041310 in words is "twenty-one million, forty-one thousand, three hundred ten".