20908086 has 16 divisors (see below), whose sum is σ = 41968368. Its totient is φ = 6944000.

The previous prime is 20908021. The next prime is 20908099. The reversal of 20908086 is 68080902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4515 + ... + 7886.

It is an arithmetic number, because the mean of its divisors is an integer number (2623023).

Almost surely, 2^20908086 is an apocalyptic number.

20908086 is an abundant number, since it is smaller than the sum of its proper divisors (21060282).

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

20908086 is a wasteful number, since it uses less digits than its factorization.

20908086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12687.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 20908086 is about 4572.5360578130. The cubic root of 20908086 is about 275.4893150578.

Adding to 20908086 its reverse (68080902), we get a palindrome (88988988).

The spelling of 20908086 in words is "twenty million, nine hundred eight thousand, eighty-six".