18840113036640 has 768 divisors, whose sum is σ = 77543234979840. Its totient is φ = 4183192166400.

The previous prime is 18840113036639. The next prime is 18840113036663. The reversal of 18840113036640 is 4663031104881.

18840113036640 is a `hidden beast` number, since 1 + 88 + 40 + 1 + 130 + 366 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 161816527 + ... + 161932913.

It is an arithmetic number, because the mean of its divisors is an integer number (100967753880).

Almost surely, 2^{18840113036640} is an apocalyptic number.

18840113036640 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 18840113036640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38771617489920).

18840113036640 is an abundant number, since it is smaller than the sum of its proper divisors (58703121943200).

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

18840113036640 is a wasteful number, since it uses less digits than its factorization.

18840113036640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116572 (or 116558 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 18840113036640 in words is "eighteen trillion, eight hundred forty billion, one hundred thirteen million, thirty-six thousand, six hundred forty".