18111042720 has 672 divisors, whose sum is σ = 68933918592. Its totient is φ = 4483454976.

The previous prime is 18111042689. The next prime is 18111042727. The reversal of 18111042720 is 2724011181.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (18111042727) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 115356882 + ... + 115357038.

It is an arithmetic number, because the mean of its divisors is an integer number (102580236).

Almost surely, 2^18111042720 is an apocalyptic number.

18111042720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18111042720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34466959296).

18111042720 is an abundant number, since it is smaller than the sum of its proper divisors (50822875872).

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

18111042720 is a wasteful number, since it uses less digits than its factorization.

18111042720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The spelling of 18111042720 in words is "eighteen billion, one hundred eleven million, forty-two thousand, seven hundred twenty".