21000602 has 8 divisors (see below), whose sum is σ = 36001056. Its totient is φ = 9000252.

The previous prime is 21000601. The next prime is 21000607. The reversal of 21000602 is 20600012.

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

It is not an unprimeable number, because it can be changed into a prime (21000601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750008 + ... + 750035.

It is an arithmetic number, because the mean of its divisors is an integer number (4500132).

Almost surely, 2^21000602 is an apocalyptic number.

21000602 is a deficient number, since it is larger than the sum of its proper divisors (15000454).

21000602 is a wasteful number, since it uses less digits than its factorization.

21000602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500052.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 21000602 is about 4582.6413780701. The cubic root of 21000602 is about 275.8950539182.

Adding to 21000602 its reverse (20600012), we get a palindrome (41600614).

The spelling of 21000602 in words is "twenty-one million, six hundred two", and thus it is an aban number.