18310118400 has 396 divisors, whose sum is σ = 74931040912. Its totient is φ = 4184801280.

The previous prime is 18310118381. The next prime is 18310118419. The reversal of 18310118400 is 481101381.

It is an interprime number because it is at equal distance from previous prime (18310118381) and next prime (18310118419).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1607124 + ... + 1618476.

Almost surely, 2^18310118400 is an apocalyptic number.

18310118400 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 18310118400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37465520456).

18310118400 is an abundant number, since it is smaller than the sum of its proper divisors (56620922512).

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

18310118400 is a wasteful number, since it uses less digits than its factorization.

18310118400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11396 (or 11370 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

Adding to 18310118400 its reverse (481101381), we get a palindrome (18791219781).

The spelling of 18310118400 in words is "eighteen billion, three hundred ten million, one hundred eighteen thousand, four hundred".