18371943383040 has 2160 divisors, whose sum is σ = 73756967251968. Its totient is φ = 4382373445632.

The previous prime is 18371943383033. The next prime is 18371943383071. The reversal of 18371943383040 is 4038334917381.

18371943383040 is a `hidden beast` number, since 1 + 8 + 37 + 194 + 3 + 383 + 0 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (2160).

It is a super-3 number, since 3×18371943383040³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 144660971457 + ... + 144660971583.

Almost surely, 2^{18371943383040} is an apocalyptic number.

18371943383040 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 18371943383040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36878483625984).

18371943383040 is an abundant number, since it is smaller than the sum of its proper divisors (55385023868928).

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

18371943383040 is an equidigital number, since it uses as much as digits as its factorization.

18371943383040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 18371943383040 in words is "eighteen trillion, three hundred seventy-one billion, nine hundred forty-three million, three hundred eighty-three thousand, forty".