18409395480 has 128 divisors (see below), whose sum is σ = 63320486400. Its totient is φ = 4194358272.

The previous prime is 18409395463. The next prime is 18409395491. The reversal of 18409395480 is 8459390481.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227911 + ... + 297929.

It is an arithmetic number, because the mean of its divisors is an integer number (494691300).

Almost surely, 2^18409395480 is an apocalyptic number.

18409395480 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 18409395480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31660243200).

18409395480 is an abundant number, since it is smaller than the sum of its proper divisors (44911090920).

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

18409395480 is a wasteful number, since it uses less digits than its factorization.

18409395480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70353 (or 70349 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 51.

The spelling of 18409395480 in words is "eighteen billion, four hundred nine million, three hundred ninety-five thousand, four hundred eighty".