20311111044 has 48 divisors (see below), whose sum is σ = 60181072000. Its totient is φ = 5803174368.

The previous prime is 20311111043. The next prime is 20311111087. The reversal of 20311111044 is 44011111302.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20311111043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13432519 + ... + 13434030.

Almost surely, 2^20311111044 is an apocalyptic number.

It is an amenable number.

20311111044 is an abundant number, since it is smaller than the sum of its proper divisors (39869960956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20311111044 is a wasteful number, since it uses less digits than its factorization.

20311111044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26866569 (or 26866561 counting only the distinct ones).

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

Adding to 20311111044 its reverse (44011111302), we get a palindrome (64322222346).

The spelling of 20311111044 in words is "twenty billion, three hundred eleven million, one hundred eleven thousand, forty-four".