18441937008 has 320 divisors, whose sum is σ = 62578137600. Its totient is φ = 5136445440.

The previous prime is 18441937001. The next prime is 18441937009. The reversal of 18441937008 is 80073914481.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18441937001) 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, 3471058 + ... + 3476366.

It is an arithmetic number, because the mean of its divisors is an integer number (195556680).

Almost surely, 2^18441937008 is an apocalyptic number.

18441937008 is a gapful number since it is divisible by the number (18) 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 18441937008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31289068800).

18441937008 is an abundant number, since it is smaller than the sum of its proper divisors (44136200592).

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

18441937008 is a wasteful number, since it uses less digits than its factorization.

18441937008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5397 (or 5385 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 18441937008 in words is "eighteen billion, four hundred forty-one million, nine hundred thirty-seven thousand, eight".