18154409472 has 320 divisors, whose sum is σ = 56264017920. Its totient is φ = 5845063680.

The previous prime is 18154409423. The next prime is 18154409489. The reversal of 18154409472 is 27490445181.

18154409472 is a `hidden beast` number, since 18 + 1 + 544 + 0 + 94 + 7 + 2 = 666.

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, 34711803 + ... + 34712325.

It is an arithmetic number, because the mean of its divisors is an integer number (175825056).

Almost surely, 2^18154409472 is an apocalyptic number.

18154409472 is a gapful number since it is divisible by the number (12) 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 18154409472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28132008960).

18154409472 is an abundant number, since it is smaller than the sum of its proper divisors (38109608448).

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

18154409472 is an frugal number, since it uses more digits than its factorization.

18154409472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 18154409472 in words is "eighteen billion, one hundred fifty-four million, four hundred nine thousand, four hundred seventy-two".