20110919 has 4 divisors (see below), whose sum is σ = 20149896. Its totient is φ = 20071944.

The previous prime is 20110879. The next prime is 20110927. The reversal of 20110919 is 91901102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20110919 - 2²⁴ = 3333703 is a prime.

It is a super-2 number, since 2×20110919² = 808898126049122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20110894 and 20110903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18704 + ... + 19749.

It is an arithmetic number, because the mean of its divisors is an integer number (5037474).

Almost surely, 2^20110919 is an apocalyptic number.

20110919 is a deficient number, since it is larger than the sum of its proper divisors (38977).

20110919 is an equidigital number, since it uses as much as digits as its factorization.

20110919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38976.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 20110919 is about 4484.5199297138. The cubic root of 20110919 is about 271.9426376658.

The spelling of 20110919 in words is "twenty million, one hundred ten thousand, nine hundred nineteen".