18276517440 has 168 divisors, whose sum is σ = 63894769848. Its totient is φ = 4793794560.

The previous prime is 18276517433. The next prime is 18276517453. The reversal of 18276517440 is 4471567281.

It can be written as a sum of positive squares in 4 ways, for example, as 12616704 + 18263900736 = 3552^2 + 135144^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123664 + ... + 227696.

It is an arithmetic number, because the mean of its divisors is an integer number (380326011).

Almost surely, 2^18276517440 is an apocalyptic number.

18276517440 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 18276517440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31947384924).

18276517440 is an abundant number, since it is smaller than the sum of its proper divisors (45618252408).

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

18276517440 is a wasteful number, since it uses less digits than its factorization.

18276517440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104117 (or 104104 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 18276517440 in words is "eighteen billion, two hundred seventy-six million, five hundred seventeen thousand, four hundred forty".