21670082 has 16 divisors (see below), whose sum is σ = 37389120. Its totient is φ = 9227088.

The previous prime is 21670079. The next prime is 21670109. The reversal of 21670082 is 28007612.

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, 2732 + ... + 7127.

It is an arithmetic number, because the mean of its divisors is an integer number (2336820).

Almost surely, 2^21670082 is an apocalyptic number.

21670082 is a deficient number, since it is larger than the sum of its proper divisors (15719038).

21670082 is a wasteful number, since it uses less digits than its factorization.

21670082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10025.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 21670082 is about 4655.1135324501. The cubic root of 21670082 is about 278.7962009930.

Adding to 21670082 its reverse (28007612), we get a palindrome (49677694).

The spelling of 21670082 in words is "twenty-one million, six hundred seventy thousand, eighty-two".