21696006 has 8 divisors (see below), whose sum is σ = 43392024. Its totient is φ = 7232000.

The previous prime is 21695983. The next prime is 21696013. The reversal of 21696006 is 60069612.

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

21696006 is an admirable number.

It is a congruent number.

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, 1807995 + ... + 1808006.

It is an arithmetic number, because the mean of its divisors is an integer number (5424003).

Almost surely, 2^21696006 is an apocalyptic number.

21696006 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21696006 is a wasteful number, since it uses less digits than its factorization.

21696006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3616006.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 21696006 is about 4657.8971650306. The cubic root of 21696006 is about 278.9073316681.

The spelling of 21696006 in words is "twenty-one million, six hundred ninety-six thousand, six".