21413335 has 8 divisors (see below), whose sum is σ = 25819056. Its totient is φ = 17048640.

The previous prime is 21413303. The next prime is 21413369. The reversal of 21413335 is 53331412.

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

It is not a de Polignac number, because 21413335 - 2⁵ = 21413303 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, 9094 + ... + 11203.

It is an arithmetic number, because the mean of its divisors is an integer number (3227382).

Almost surely, 2^21413335 is an apocalyptic number.

21413335 is a deficient number, since it is larger than the sum of its proper divisors (4405721).

21413335 is a wasteful number, since it uses less digits than its factorization.

21413335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20513.

The product of its digits is 1080, while the sum is 22.

The square root of 21413335 is about 4627.4544838388. The cubic root of 21413335 is about 277.6907651317.

Adding to 21413335 its reverse (53331412), we get a palindrome (74744747).

It can be divided in two parts, 2141 and 3335, that added together give a square (5476 = 74²).

The spelling of 21413335 in words is "twenty-one million, four hundred thirteen thousand, three hundred thirty-five".