20105092 has 36 divisors (see below), whose sum is σ = 41566224. Its totient is φ = 8482320.

The previous prime is 20105089. The next prime is 20105117. The reversal of 20105092 is 29050102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12367 + ... + 13897.

Almost surely, 2^20105092 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20105092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20783112).

20105092 is an abundant number, since it is smaller than the sum of its proper divisors (21461132).

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

20105092 is a wasteful number, since it uses less digits than its factorization.

20105092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616 (or 1607 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 20105092 is about 4483.8702032954. The cubic root of 20105092 is about 271.9163706278.

Adding to 20105092 its reverse (29050102), we get a palindrome (49155194).

The spelling of 20105092 in words is "twenty million, one hundred five thousand, ninety-two".