18449356500 has 192 divisors, whose sum is σ = 60966097920. Its totient is φ = 4814985600.

The previous prime is 18449356493. The next prime is 18449356501. The reversal of 18449356500 is 565394481.

18449356500 is a `hidden beast` number, since 1 + 8 + 4 + 4 + 93 + 56 + 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 not an unprimeable number, because it can be changed into a prime (18449356501) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 619962 + ... + 649038.

It is an arithmetic number, because the mean of its divisors is an integer number (317531760).

Almost surely, 2^18449356500 is an apocalyptic number.

18449356500 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 18449356500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30483048960).

18449356500 is an abundant number, since it is smaller than the sum of its proper divisors (42516741420).

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

18449356500 is a wasteful number, since it uses less digits than its factorization.

18449356500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29152 (or 29134 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 18449356500 in words is "eighteen billion, four hundred forty-nine million, three hundred fifty-six thousand, five hundred".