21332135 has 8 divisors (see below), whose sum is σ = 27925776. Its totient is φ = 15514240.

The previous prime is 21332119. The next prime is 21332141. The reversal of 21332135 is 53123312.

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

It is not a de Polignac number, because 21332135 - 2⁴ = 21332119 is a prime.

It is a Duffinian number.

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, 193874 + ... + 193983.

It is an arithmetic number, because the mean of its divisors is an integer number (3490722).

Almost surely, 2^21332135 is an apocalyptic number.

21332135 is a deficient number, since it is larger than the sum of its proper divisors (6593641).

21332135 is a wasteful number, since it uses less digits than its factorization.

21332135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387873.

The product of its digits is 540, while the sum is 20.

The square root of 21332135 is about 4618.6724283066. The cubic root of 21332135 is about 277.3393166560.

Adding to 21332135 its reverse (53123312), we get a palindrome (74455447).

The spelling of 21332135 in words is "twenty-one million, three hundred thirty-two thousand, one hundred thirty-five".