18988601558420 has 192 divisors, whose sum is σ = 46294959594240. Its totient is φ = 6479229837312.

The previous prime is 18988601558419. The next prime is 18988601558429. The reversal of 18988601558420 is 2485510688981.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18988601558429) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 222402659 + ... + 222488021.

It is an arithmetic number, because the mean of its divisors is an integer number (241119581220).

Almost surely, 2^{18988601558420} is an apocalyptic number.

18988601558420 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 18988601558420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23147479797120).

18988601558420 is an abundant number, since it is smaller than the sum of its proper divisors (27306358035820).

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

18988601558420 is a wasteful number, since it uses less digits than its factorization.

18988601558420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86314 (or 86312 counting only the distinct ones).

The product of its (nonzero) digits is 44236800, while the sum is 65.

The spelling of 18988601558420 in words is "eighteen trillion, nine hundred eighty-eight billion, six hundred one million, five hundred fifty-eight thousand, four hundred twenty".