18038504880 has 240 divisors, whose sum is σ = 66264535584. Its totient is φ = 4361195520.

The previous prime is 18038504863. The next prime is 18038504881. The reversal of 18038504880 is 8840583081.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is not an unprimeable number, because it can be changed into a prime (18038504881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3141372 + ... + 3147108.

Almost surely, 2^18038504880 is an apocalyptic number.

18038504880 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 18038504880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33132267792).

18038504880 is an abundant number, since it is smaller than the sum of its proper divisors (48226030704).

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

18038504880 is a wasteful number, since it uses less digits than its factorization.

18038504880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6164 (or 6155 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The spelling of 18038504880 in words is "eighteen billion, thirty-eight million, five hundred four thousand, eight hundred eighty".