21135035 has 8 divisors (see below), whose sum is σ = 25387296. Its totient is φ = 16891200.

The previous prime is 21135031. The next prime is 21135041. The reversal of 21135035 is 53053112.

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

It is not a de Polignac number, because 21135035 - 2² = 21135031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21134998 and 21135016.

It is not an unprimeable number, because it can be changed into a prime (21135031) 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, 7010 + ... + 9560.

It is an arithmetic number, because the mean of its divisors is an integer number (3173412).

Almost surely, 2^21135035 is an apocalyptic number.

21135035 is a deficient number, since it is larger than the sum of its proper divisors (4252261).

21135035 is a wasteful number, since it uses less digits than its factorization.

21135035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4213.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 21135035 is about 4597.2856121847. The cubic root of 21135035 is about 276.4825059482.

Adding to 21135035 its reverse (53053112), we get a palindrome (74188147).

The spelling of 21135035 in words is "twenty-one million, one hundred thirty-five thousand, thirty-five".