18361109376 has 128 divisors (see below), whose sum is σ = 55512928800. Its totient is φ = 5971046400.

The previous prime is 18361109359. The next prime is 18361109383. The reversal of 18361109376 is 67390116381.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76906 + ... + 206486.

Almost surely, 2^18361109376 is an apocalyptic number.

18361109376 is a gapful number since it is divisible by the number (16) 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 18361109376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27756464400).

18361109376 is an abundant number, since it is smaller than the sum of its proper divisors (37151819424).

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

18361109376 is a wasteful number, since it uses less digits than its factorization.

18361109376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129645 (or 129627 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 18361109376 in words is "eighteen billion, three hundred sixty-one million, one hundred nine thousand, three hundred seventy-six".