18783374187040 has 48 divisors (see below), whose sum is σ = 44408327264280. Its totient is φ = 7507829125120.

The previous prime is 18783374187029. The next prime is 18783374187047. The reversal of 18783374187040 is 4078147338781.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14469229176336 + 4314145010704 = 3803844^2 + 2077052^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18783374187040.

It is not an unprimeable number, because it can be changed into a prime (18783374187047) 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, 42910855 + ... + 43346374.

Almost surely, 2^{18783374187040} is an apocalyptic number.

18783374187040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18783374187040 is an abundant number, since it is smaller than the sum of its proper divisors (25624953077240).

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

18783374187040 is a wasteful number, since it uses less digits than its factorization.

18783374187040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86258605 (or 86258597 counting only the distinct ones).

The product of its (nonzero) digits is 25288704, while the sum is 61.

The spelling of 18783374187040 in words is "eighteen trillion, seven hundred eighty-three billion, three hundred seventy-four million, one hundred eighty-seven thousand, forty".