18246737418 has 128 divisors (see below), whose sum is σ = 46578309120. Its totient is φ = 4634945280.

The previous prime is 18246737417. The next prime is 18246737429. The reversal of 18246737418 is 81473764281.

It is not an unprimeable number, because it can be changed into a prime (18246737417) 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, 7773321 + ... + 7775667.

It is an arithmetic number, because the mean of its divisors is an integer number (363893040).

Almost surely, 2^18246737418 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18246737418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23289154560).

18246737418 is an abundant number, since it is smaller than the sum of its proper divisors (28331571702).

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

18246737418 is a wasteful number, since it uses less digits than its factorization.

18246737418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2892.

The product of its digits is 1806336, while the sum is 51.

The spelling of 18246737418 in words is "eighteen billion, two hundred forty-six million, seven hundred thirty-seven thousand, four hundred eighteen".