18381197560 has 64 divisors (see below), whose sum is σ = 45531525600. Its totient is φ = 6622732800.

The previous prime is 18381197543. The next prime is 18381197561. The reversal of 18381197560 is 6579118381.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18381197561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143671 + ... + 239590.

Almost surely, 2^18381197560 is an apocalyptic number.

18381197560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18381197560 is an abundant number, since it is smaller than the sum of its proper divisors (27150328040).

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

18381197560 is a wasteful number, since it uses less digits than its factorization.

18381197560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383392 (or 383388 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 49.

The spelling of 18381197560 in words is "eighteen billion, three hundred eighty-one million, one hundred ninety-seven thousand, five hundred sixty".