18355474368 has 896 divisors, whose sum is σ = 71630438400. Its totient is φ = 4470681600.

The previous prime is 18355474309. The next prime is 18355474373. The reversal of 18355474368 is 86347455381.

18355474368 is a `hidden beast` number, since 1 + 8 + 35 + 547 + 4 + 3 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 258527773 + ... + 258527843.

Almost surely, 2^18355474368 is an apocalyptic number.

18355474368 is a gapful number since it is divisible by the number (18) 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 18355474368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35815219200).

18355474368 is an abundant number, since it is smaller than the sum of its proper divisors (53274964032).

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

18355474368 is a wasteful number, since it uses less digits than its factorization.

18355474368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 190 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 18355474368 in words is "eighteen billion, three hundred fifty-five million, four hundred seventy-four thousand, three hundred sixty-eight".