20869286 has 8 divisors (see below), whose sum is σ = 31343760. Its totient is φ = 10421368.

The previous prime is 20869279. The next prime is 20869291. The reversal of 20869286 is 68296802.

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

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, 4541 + ... + 7896.

It is an arithmetic number, because the mean of its divisors is an integer number (3917970).

Almost surely, 2^20869286 is an apocalyptic number.

20869286 is a deficient number, since it is larger than the sum of its proper divisors (10474474).

20869286 is a wasteful number, since it uses less digits than its factorization.

20869286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13278.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 20869286 is about 4568.2913654889. The cubic root of 20869286 is about 275.3187972296.

The spelling of 20869286 in words is "twenty million, eight hundred sixty-nine thousand, two hundred eighty-six".