20019100911 has 8 divisors (see below), whose sum is σ = 26703317040. Its totient is φ = 13340476032.

The previous prime is 20019100883. The next prime is 20019101017. The reversal of 20019100911 is 11900191002.

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

It is not a de Polignac number, because 20019100911 - 2¹³ = 20019092719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20019100811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1389450 + ... + 1403783.

It is an arithmetic number, because the mean of its divisors is an integer number (3337914630).

Almost surely, 2^20019100911 is an apocalyptic number.

20019100911 is a deficient number, since it is larger than the sum of its proper divisors (6684216129).

20019100911 is a wasteful number, since it uses less digits than its factorization.

20019100911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2795625.

The product of its (nonzero) digits is 162, while the sum is 24.

Adding to 20019100911 its reverse (11900191002), we get a palindrome (31919291913).

The spelling of 20019100911 in words is "twenty billion, nineteen million, one hundred thousand, nine hundred eleven".