21096635 has 32 divisors (see below), whose sum is σ = 30689280. Its totient is φ = 13609728.

The previous prime is 21096619. The next prime is 21096653. The reversal of 21096635 is 53669012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21096635 - 2⁴ = 21096619 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58586 + ... + 58944.

It is an arithmetic number, because the mean of its divisors is an integer number (959040).

Almost surely, 2^21096635 is an apocalyptic number.

21096635 is a deficient number, since it is larger than the sum of its proper divisors (9592645).

21096635 is a wasteful number, since it uses less digits than its factorization.

21096635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 21096635 is about 4593.1073359981. The cubic root of 21096635 is about 276.3149584826.

The spelling of 21096635 in words is "twenty-one million, ninety-six thousand, six hundred thirty-five".