18530918400 has 168 divisors, whose sum is σ = 61273861704. Its totient is φ = 4941414400.

The previous prime is 18530918383. The next prime is 18530918401. The reversal of 18530918400 is 481903581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18530918401) 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, 599320 + ... + 629480.

Almost surely, 2^18530918400 is an apocalyptic number.

18530918400 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 18530918400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30636930852).

18530918400 is an abundant number, since it is smaller than the sum of its proper divisors (42742943304).

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

18530918400 is an equidigital number, since it uses as much as digits as its factorization.

18530918400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30200 (or 30171 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 18530918400 in words is "eighteen billion, five hundred thirty million, nine hundred eighteen thousand, four hundred".