21034135 has 8 divisors (see below), whose sum is σ = 26111520. Its totient is φ = 16246944.

The previous prime is 21034133. The next prime is 21034183. The reversal of 21034135 is 53143012.

21034135 = T₆₇ + T₆₈ + ... + T₅₀₁.

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

It is a cyclic number.

It is not a de Polignac number, because 21034135 - 2¹ = 21034133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72387 + ... + 72676.

It is an arithmetic number, because the mean of its divisors is an integer number (3263940).

Almost surely, 2^21034135 is an apocalyptic number.

21034135 is a deficient number, since it is larger than the sum of its proper divisors (5077385).

21034135 is a wasteful number, since it uses less digits than its factorization.

21034135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145097.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 21034135 is about 4586.2986165316. The cubic root of 21034135 is about 276.0418222348.

Adding to 21034135 its reverse (53143012), we get a palindrome (74177147).

The spelling of 21034135 in words is "twenty-one million, thirty-four thousand, one hundred thirty-five".