18811742722844 has 24 divisors (see below), whose sum is σ = 33259974052368. Its totient is φ = 9308968502400.

The previous prime is 18811742722841. The next prime is 18811742722859. The reversal of 18811742722844 is 44822724711881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18811742722841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8440649 + ... + 10433984.

It is an arithmetic number, because the mean of its divisors is an integer number (1385832252182).

Almost surely, 2^{18811742722844} is an apocalyptic number.

It is an amenable number.

18811742722844 is a deficient number, since it is larger than the sum of its proper divisors (14448231329524).

18811742722844 is a wasteful number, since it uses less digits than its factorization.

18811742722844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18877205 (or 18877203 counting only the distinct ones).

The product of its digits is 12845056, while the sum is 59.

The spelling of 18811742722844 in words is "eighteen trillion, eight hundred eleven billion, seven hundred forty-two million, seven hundred twenty-two thousand, eight hundred forty-four".