20109190 has 16 divisors (see below), whose sum is σ = 36254160. Its totient is φ = 8030880.

The previous prime is 20109161. The next prime is 20109191. The reversal of 20109190 is 9190102.

It is a super-2 number, since 2×20109190² = 808759044912200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20109191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7420 + ... + 9760.

It is an arithmetic number, because the mean of its divisors is an integer number (2265885).

Almost surely, 2^20109190 is an apocalyptic number.

20109190 is a deficient number, since it is larger than the sum of its proper divisors (16144970).

20109190 is a wasteful number, since it uses less digits than its factorization.

20109190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3207.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 20109190 is about 4484.3271513127. The cubic root of 20109190 is about 271.9348441831.

Adding to 20109190 its reverse (9190102), we get a palindrome (29299292).

The spelling of 20109190 in words is "twenty million, one hundred nine thousand, one hundred ninety".