18357475500 has 960 divisors, whose sum is σ = 78315164928. Its totient is φ = 3632947200.

The previous prime is 18357475471. The next prime is 18357475523. The reversal of 18357475500 is 557475381.

It is a happy number.

18357475500 is a `hidden beast` number, since 1 + 8 + 3 + 5 + 74 + 75 + 500 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 62653354 + ... + 62653646.

Almost surely, 2^18357475500 is an apocalyptic number.

18357475500 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 18357475500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39157582464).

18357475500 is an abundant number, since it is smaller than the sum of its proper divisors (59957689428).

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

18357475500 is a wasteful number, since it uses less digits than its factorization.

18357475500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 45.

The spelling of 18357475500 in words is "eighteen billion, three hundred fifty-seven million, four hundred seventy-five thousand, five hundred".