20105086 has 8 divisors (see below), whose sum is σ = 30439800. Its totient is φ = 9958488.

The previous prime is 20105053. The next prime is 20105087. The reversal of 20105086 is 68050102.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20105087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46761 + ... + 47188.

It is an arithmetic number, because the mean of its divisors is an integer number (3804975).

Almost surely, 2^20105086 is an apocalyptic number.

20105086 is a deficient number, since it is larger than the sum of its proper divisors (10334714).

20105086 is a wasteful number, since it uses less digits than its factorization.

20105086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94058.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 20105086 is about 4483.8695342305. The cubic root of 20105086 is about 271.9163435783.

Adding to 20105086 its reverse (68050102), we get a palindrome (88155188).

The spelling of 20105086 in words is "twenty million, one hundred five thousand, eighty-six".