21065035 has 8 divisors (see below), whose sum is σ = 25302816. Its totient is φ = 16835520.

The previous prime is 21065003. The next prime is 21065041. The reversal of 21065035 is 53056012.

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 21065035 - 2⁵ = 21065003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21064997 and 21065015.

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, 8095 + ... + 10375.

It is an arithmetic number, because the mean of its divisors is an integer number (3162852).

Almost surely, 2^21065035 is an apocalyptic number.

21065035 is a deficient number, since it is larger than the sum of its proper divisors (4237781).

21065035 is a wasteful number, since it uses less digits than its factorization.

21065035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4133.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 21065035 is about 4589.6661098603. Note that the first 3 decimals coincide. The cubic root of 21065035 is about 276.1769283197.

The spelling of 21065035 in words is "twenty-one million, sixty-five thousand, thirty-five".