18049473600 has 336 divisors, whose sum is σ = 61089893568. Its totient is φ = 4662927360.

The previous prime is 18049473587. The next prime is 18049473601. The reversal of 18049473600 is 637494081.

It is not an unprimeable number, because it can be changed into a prime (18049473601) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32404522 + ... + 32405078.

Almost surely, 2^18049473600 is an apocalyptic number.

18049473600 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 18049473600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30544946784).

18049473600 is an abundant number, since it is smaller than the sum of its proper divisors (43040419968).

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

18049473600 is a wasteful number, since it uses less digits than its factorization.

18049473600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 18049473600 in words is "eighteen billion, forty-nine million, four hundred seventy-three thousand, six hundred".