21410735 has 16 divisors (see below), whose sum is σ = 27322272. Its totient is φ = 16051200.

The previous prime is 21410731. The next prime is 21410747. The reversal of 21410735 is 53701412.

It is not a de Polignac number, because 21410735 - 2² = 21410731 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21410735.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21410731) 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, 27755 + ... + 28515.

It is an arithmetic number, because the mean of its divisors is an integer number (1707642).

Almost surely, 2^21410735 is an apocalyptic number.

21410735 is a deficient number, since it is larger than the sum of its proper divisors (5911537).

21410735 is a wasteful number, since it uses less digits than its factorization.

21410735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 21410735 is about 4627.1735433199. The cubic root of 21410735 is about 277.6795256367.

The spelling of 21410735 in words is "twenty-one million, four hundred ten thousand, seven hundred thirty-five".