18194442147840 has 1536 divisors, whose sum is σ = 73039557427200. Its totient is φ = 3775274680320.

The previous prime is 18194442147839. The next prime is 18194442147841. The reversal of 18194442147840 is 4874124449181.

It is an interprime number because it is at equal distance from previous prime (18194442147839) and next prime (18194442147841).

It is a tau number, because it is divible by the number of its divisors (1536).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18194442147841) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8126145441 + ... + 8126147679.

It is an arithmetic number, because the mean of its divisors is an integer number (47551795200).

Almost surely, 2^{18194442147840} is an apocalyptic number.

18194442147840 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 18194442147840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36519778713600).

18194442147840 is an abundant number, since it is smaller than the sum of its proper divisors (54845115279360).

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

18194442147840 is a wasteful number, since it uses less digits than its factorization.

18194442147840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383 (or 2363 counting only the distinct ones).

The product of its (nonzero) digits is 8257536, while the sum is 57.

The spelling of 18194442147840 in words is "eighteen trillion, one hundred ninety-four billion, four hundred forty-two million, one hundred forty-seven thousand, eight hundred forty".