11000020019 has 4 divisors (see below), whose sum is σ = 11024519400. Its totient is φ = 10975520640.

The previous prime is 11000019977. The next prime is 11000020021. The reversal of 11000020019 is 91002000011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91002000011 = 13 ⋅7000153847.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11000020019 is a prime.

It is a super-2 number, since 2×11000020019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11000019985 and 11000020012.

It is not an unprimeable number, because it can be changed into a prime (11000020049) 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, 12249017 + ... + 12249914.

It is an arithmetic number, because the mean of its divisors is an integer number (2756129850).

Almost surely, 2^11000020019 is an apocalyptic number.

11000020019 is a deficient number, since it is larger than the sum of its proper divisors (24499381).

11000020019 is an equidigital number, since it uses as much as digits as its factorization.

11000020019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24499380.

The product of its (nonzero) digits is 18, while the sum is 14.

The spelling of 11000020019 in words is "eleven billion, twenty thousand, nineteen".