21796206 has 8 divisors (see below), whose sum is σ = 43592424. Its totient is φ = 7265400.

The previous prime is 21796199. The next prime is 21796207. The reversal of 21796206 is 60269712.

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

21796206 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21796207) 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 in 3 ways as a sum of consecutive naturals, for example, 1816345 + ... + 1816356.

It is an arithmetic number, because the mean of its divisors is an integer number (5449053).

Almost surely, 2^21796206 is an apocalyptic number.

21796206 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.

21796206 is a wasteful number, since it uses less digits than its factorization.

21796206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3632706.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 21796206 is about 4668.6407015319. The cubic root of 21796206 is about 279.3360373372.

It can be divided in two parts, 2179 and 6206, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 21796206 in words is "twenty-one million, seven hundred ninety-six thousand, two hundred six".