20443340111 has 12 divisors (see below), whose sum is σ = 21773921400. Its totient is φ = 19189655568.

The previous prime is 20443340087. The next prime is 20443340117. The reversal of 20443340111 is 11104334402.

It is not a de Polignac number, because 20443340111 - 2³⁴ = 3263470927 is a prime.

It is a super-3 number, since 3×20443340111³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443340117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220421 + ... + 299118.

It is an arithmetic number, because the mean of its divisors is an integer number (1814493450).

Almost surely, 2^20443340111 is an apocalyptic number.

20443340111 is a deficient number, since it is larger than the sum of its proper divisors (1330581289).

20443340111 is a wasteful number, since it uses less digits than its factorization.

20443340111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519686 (or 519667 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20443340111 its reverse (11104334402), we get a palindrome (31547674513).

The spelling of 20443340111 in words is "twenty billion, four hundred forty-three million, three hundred forty thousand, one hundred eleven".