18409815480 has 384 divisors, whose sum is σ = 67477639680. Its totient is φ = 3998776320.

The previous prime is 18409815443. The next prime is 18409815493. The reversal of 18409815480 is 8451890481.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26641935 + ... + 26642625.

It is an arithmetic number, because the mean of its divisors is an integer number (175723020).

Almost surely, 2^18409815480 is an apocalyptic number.

18409815480 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 18409815480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33738819840).

18409815480 is an abundant number, since it is smaller than the sum of its proper divisors (49067824200).

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

18409815480 is a wasteful number, since it uses less digits than its factorization.

18409815480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939 (or 928 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 48.

The spelling of 18409815480 in words is "eighteen billion, four hundred nine million, eight hundred fifteen thousand, four hundred eighty".