21412535 has 8 divisors (see below), whose sum is σ = 26057376. Its totient is φ = 16888480.

The previous prime is 21412513. The next prime is 21412549. The reversal of 21412535 is 53521412.

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

It is not a de Polignac number, because 21412535 - 2²² = 17218231 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 21412535.

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, 29804 + ... + 30513.

It is an arithmetic number, because the mean of its divisors is an integer number (3257172).

Almost surely, 2^21412535 is an apocalyptic number.

21412535 is a deficient number, since it is larger than the sum of its proper divisors (4644841).

21412535 is an equidigital number, since it uses as much as digits as its factorization.

21412535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60393.

The product of its digits is 1200, while the sum is 23.

The square root of 21412535 is about 4627.3680424189. The cubic root of 21412535 is about 277.6873069225.

Adding to 21412535 its reverse (53521412), we get a palindrome (74933947).

The spelling of 21412535 in words is "twenty-one million, four hundred twelve thousand, five hundred thirty-five".