20111044403443 has 32 divisors (see below), whose sum is σ = 23950688256000. Its totient is φ = 16523713532160.

The previous prime is 20111044403441. The next prime is 20111044403467. The reversal of 20111044403443 is 34430444011102.

It is a cyclic number.

It is not a de Polignac number, because 20111044403443 - 2¹ = 20111044403441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111044403441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75769998 + ... + 76034956.

It is an arithmetic number, because the mean of its divisors is an integer number (748459008000).

Almost surely, 2^{20111044403443} is an apocalyptic number.

20111044403443 is a deficient number, since it is larger than the sum of its proper divisors (3839643852557).

20111044403443 is a wasteful number, since it uses less digits than its factorization.

20111044403443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268315.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 20111044403443 its reverse (34430444011102), we get a palindrome (54541488414545).

The spelling of 20111044403443 in words is "twenty trillion, one hundred eleven billion, forty-four million, four hundred three thousand, four hundred forty-three".