18447040051200 has 1440 divisors, whose sum is σ = 72352140260400. Its totient is φ = 4632336138240.

The previous prime is 18447040051199. The next prime is 18447040051241. The reversal of 18447040051200 is 215004074481.

It is a happy number.

18447040051200 is a `hidden beast` number, since 1 + 8 + 4 + 47 + 0 + 400 + 5 + 1 + 200 = 666.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 15207781794 + ... + 15207783006.

Almost surely, 2^{18447040051200} is an apocalyptic number.

18447040051200 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 18447040051200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36176070130200).

18447040051200 is an abundant number, since it is smaller than the sum of its proper divisors (53905100209200).

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

18447040051200 is a wasteful number, since it uses less digits than its factorization.

18447040051200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469 (or 1435 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The spelling of 18447040051200 in words is "eighteen trillion, four hundred forty-seven billion, forty million, fifty-one thousand, two hundred".