18478434600 has 288 divisors, whose sum is σ = 66992140800. Its totient is φ = 4550515200.

The previous prime is 18478434599. The next prime is 18478434617. The reversal of 18478434600 is 643487481.

18478434600 is a `hidden beast` number, since 1 + 8 + 4 + 7 + 8 + 4 + 34 + 600 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 71 ways as a sum of consecutive naturals, for example, 1192905 + ... + 1208295.

It is an arithmetic number, because the mean of its divisors is an integer number (232611600).

Almost surely, 2^18478434600 is an apocalyptic number.

18478434600 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 18478434600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33496070400).

18478434600 is an abundant number, since it is smaller than the sum of its proper divisors (48513706200).

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

18478434600 is a wasteful number, since it uses less digits than its factorization.

18478434600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15465 (or 15453 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 18478434600 in words is "eighteen billion, four hundred seventy-eight million, four hundred thirty-four thousand, six hundred".