20869206 has 8 divisors (see below), whose sum is σ = 41738424. Its totient is φ = 6956400.

The previous prime is 20869187. The next prime is 20869223. The reversal of 20869206 is 60296802.

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

20869206 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 1739095 + ... + 1739106.

It is an arithmetic number, because the mean of its divisors is an integer number (5217303).

Almost surely, 2^20869206 is an apocalyptic number.

20869206 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.

20869206 is a wasteful number, since it uses less digits than its factorization.

20869206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3478206.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 20869206 is about 4568.2826094715. The cubic root of 20869206 is about 275.3184454282.

The spelling of 20869206 in words is "twenty million, eight hundred sixty-nine thousand, two hundred six".