21671002 has 8 divisors (see below), whose sum is σ = 32527296. Its totient is φ = 10828572.

The previous prime is 21670981. The next prime is 21671017. The reversal of 21671002 is 20017612.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2493 + ... + 7039.

It is an arithmetic number, because the mean of its divisors is an integer number (4065912).

Almost surely, 2^21671002 is an apocalyptic number.

21671002 is a deficient number, since it is larger than the sum of its proper divisors (10856294).

21671002 is a wasteful number, since it uses less digits than its factorization.

21671002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6932.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 21671002 is about 4655.2123474660. The cubic root of 21671002 is about 278.8001463537.

Adding to 21671002 its reverse (20017612), we get a palindrome (41688614).

The spelling of 21671002 in words is "twenty-one million, six hundred seventy-one thousand, two".