21068435 has 8 divisors (see below), whose sum is σ = 26612880. Its totient is φ = 15967584.

The previous prime is 21068417. The next prime is 21068441. The reversal of 21068435 is 53486012.

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 21068435 - 2¹⁴ = 21052051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21068398 and 21068407.

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, 110792 + ... + 110981.

It is an arithmetic number, because the mean of its divisors is an integer number (3326610).

Almost surely, 2^21068435 is an apocalyptic number.

21068435 is a deficient number, since it is larger than the sum of its proper divisors (5544445).

21068435 is a wasteful number, since it uses less digits than its factorization.

21068435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221797.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 21068435 is about 4590.0364922297. The cubic root of 21068435 is about 276.1917862908.

The spelling of 21068435 in words is "twenty-one million, sixty-eight thousand, four hundred thirty-five".