20886806 has 8 divisors (see below), whose sum is σ = 32692464. Its totient is φ = 9989320.

The previous prime is 20886799. The next prime is 20886893. The reversal of 20886806 is 60868802.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20886806.

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, 226985 + ... + 227076.

It is an arithmetic number, because the mean of its divisors is an integer number (4086558).

Almost surely, 2^20886806 is an apocalyptic number.

20886806 is a deficient number, since it is larger than the sum of its proper divisors (11805658).

20886806 is a wasteful number, since it uses less digits than its factorization.

20886806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454086.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 20886806 is about 4570.2085291593. The cubic root of 20886806 is about 275.3958200873.

The spelling of 20886806 in words is "twenty million, eight hundred eighty-six thousand, eight hundred six".