20888286 has 16 divisors (see below), whose sum is σ = 41827968. Its totient is φ = 6954200.

The previous prime is 20888281. The next prime is 20888299. The reversal of 20888286 is 68288802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20888281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4951 + ... + 8141.

It is an arithmetic number, because the mean of its divisors is an integer number (2614248).

Almost surely, 2^20888286 is an apocalyptic number.

20888286 is an abundant number, since it is smaller than the sum of its proper divisors (20939682).

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

20888286 is a wasteful number, since it uses less digits than its factorization.

20888286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4287.

The product of its (nonzero) digits is 98304, while the sum is 42.

The square root of 20888286 is about 4570.3704445045. The cubic root of 20888286 is about 275.4023246112.

The spelling of 20888286 in words is "twenty million, eight hundred eighty-eight thousand, two hundred eighty-six".