21324035 has 8 divisors (see below), whose sum is σ = 27094176. Its totient is φ = 16055680.

The previous prime is 21324031. The next prime is 21324047. The reversal of 21324035 is 53042312.

It is a happy number.

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

It is not a de Polignac number, because 21324035 - 2² = 21324031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21323998 and 21324016.

It is not an unprimeable number, because it can be changed into a prime (21324031) 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, 125351 + ... + 125520.

It is an arithmetic number, because the mean of its divisors is an integer number (3386772).

Almost surely, 2^21324035 is an apocalyptic number.

21324035 is a deficient number, since it is larger than the sum of its proper divisors (5770141).

21324035 is a wasteful number, since it uses less digits than its factorization.

21324035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250893.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 21324035 is about 4617.7954697020. The cubic root of 21324035 is about 277.3042094830.

Adding to 21324035 its reverse (53042312), we get a palindrome (74366347).

The spelling of 21324035 in words is "twenty-one million, three hundred twenty-four thousand, thirty-five".