18490484400 has 60 divisors (see below), whose sum is σ = 59231188872. Its totient is φ = 4930795520.

The previous prime is 18490484399. The next prime is 18490484407. The reversal of 18490484400 is 448409481.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (18490484407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7703169 + ... + 7705568.

Almost surely, 2^18490484400 is an apocalyptic number.

18490484400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18490484400 is an abundant number, since it is smaller than the sum of its proper divisors (40740704472).

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

18490484400 is a wasteful number, since it uses less digits than its factorization.

18490484400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15408758 (or 15408747 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The spelling of 18490484400 in words is "eighteen billion, four hundred ninety million, four hundred eighty-four thousand, four hundred".