18540500832 has 720 divisors, whose sum is σ = 69577377408. Its totient is φ = 4807434240.

The previous prime is 18540500807. The next prime is 18540500861. The reversal of 18540500832 is 23800504581.

It is a happy number.

18540500832 is a `hidden beast` number, since 1 + 85 + 40 + 500 + 8 + 32 = 666.

It is a super-2 number, since 2×18540500832² (a number of 21 digits) contains 22 as substring.

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, 66933078 + ... + 66933354.

Almost surely, 2^18540500832 is an apocalyptic number.

18540500832 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 18540500832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34788688704).

18540500832 is an abundant number, since it is smaller than the sum of its proper divisors (51036876576).

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

18540500832 is a wasteful number, since it uses less digits than its factorization.

18540500832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The spelling of 18540500832 in words is "eighteen billion, five hundred forty million, five hundred thousand, eight hundred thirty-two".