20440311111 has 18 divisors (see below), whose sum is σ = 32452984200. Its totient is φ = 12388066680.

The previous prime is 20440311107. The next prime is 20440311127. The reversal of 20440311111 is 11111304402.

20440311111 is a `hidden beast` number, since 204 + 40 + 311 + 111 = 666.

It is not a de Polignac number, because 20440311111 - 2² = 20440311107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440311161) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9383811 + ... + 9385988.

Almost surely, 2^20440311111 is an apocalyptic number.

20440311111 is a deficient number, since it is larger than the sum of its proper divisors (12012673089).

20440311111 is a wasteful number, since it uses less digits than its factorization.

20440311111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18769827 (or 18769813 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 20440311111 its reverse (11111304402), we get a palindrome (31551615513).

The spelling of 20440311111 in words is "twenty billion, four hundred forty million, three hundred eleven thousand, one hundred eleven".