20190909111 has 8 divisors (see below), whose sum is σ = 26922270960. Its totient is φ = 13460076672.

The previous prime is 20190909107. The next prime is 20190909127. The reversal of 20190909111 is 11190909102.

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

It is not a de Polignac number, because 20190909111 - 2² = 20190909107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20190909131) 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, 32626 + ... + 203583.

It is an arithmetic number, because the mean of its divisors is an integer number (3365283870).

Almost surely, 2^20190909111 is an apocalyptic number.

20190909111 is a deficient number, since it is larger than the sum of its proper divisors (6731361849).

20190909111 is a wasteful number, since it uses less digits than its factorization.

20190909111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264705.

The product of its (nonzero) digits is 1458, while the sum is 33.

Subtracting from 20190909111 its reverse (11190909102), we obtain a palindrome (9000000009).

It can be divided in two parts, 201909091 and 11, that added together give a palindrome (201909102).

The spelling of 20190909111 in words is "twenty billion, one hundred ninety million, nine hundred nine thousand, one hundred eleven".