21034606 has 4 divisors (see below), whose sum is σ = 31551912. Its totient is φ = 10517302.

The previous prime is 21034603. The next prime is 21034609. The reversal of 21034606 is 60643012.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21034603) and next prime (21034609).

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5258650 + ... + 5258653.

It is an arithmetic number, because the mean of its divisors is an integer number (7887978).

Almost surely, 2^21034606 is an apocalyptic number.

21034606 is a deficient number, since it is larger than the sum of its proper divisors (10517306).

21034606 is a wasteful number, since it uses less digits than its factorization.

21034606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10517305.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 21034606 is about 4586.3499648413. The cubic root of 21034606 is about 276.0438826115.

Adding to 21034606 its reverse (60643012), we get a palindrome (81677618).

The spelling of 21034606 in words is "twenty-one million, thirty-four thousand, six hundred six".