20109182819091 has 32 divisors (see below), whose sum is σ = 27837619040256. Its totient is φ = 12901608720000.

The previous prime is 20109182819081. The next prime is 20109182819123. The reversal of 20109182819091 is 19091828190102.

It is a happy number.

It is not a de Polignac number, because 20109182819091 - 2²¹ = 20109180721939 is a prime.

It is a super-3 number, since 3×20109182819091³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20109182819081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10205106 + ... + 12015096.

It is an arithmetic number, because the mean of its divisors is an integer number (869925595008).

Almost surely, 2^{20109182819091} is an apocalyptic number.

20109182819091 is a deficient number, since it is larger than the sum of its proper divisors (7728436221165).

20109182819091 is a wasteful number, since it uses less digits than its factorization.

20109182819091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811123.

The product of its (nonzero) digits is 186624, while the sum is 51.

The spelling of 20109182819091 in words is "twenty trillion, one hundred nine billion, one hundred eighty-two million, eight hundred nineteen thousand, ninety-one".