20912286 has 8 divisors (see below), whose sum is σ = 41824584. Its totient is φ = 6970760.

The previous prime is 20912273. The next prime is 20912291. The reversal of 20912286 is 68221902.

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

20912286 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, 1742685 + ... + 1742696.

It is an arithmetic number, because the mean of its divisors is an integer number (5228073).

Almost surely, 2^20912286 is an apocalyptic number.

20912286 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.

20912286 is a wasteful number, since it uses less digits than its factorization.

20912286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3485386.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 20912286 is about 4572.9952984887. The cubic root of 20912286 is about 275.5077605156.

The spelling of 20912286 in words is "twenty million, nine hundred twelve thousand, two hundred eighty-six".