18373487616 has 264 divisors, whose sum is σ = 60928545600. Its totient is φ = 5274132480.

The previous prime is 18373487611. The next prime is 18373487617. The reversal of 18373487616 is 61678437381.

18373487616 is a `hidden beast` number, since 1 + 83 + 73 + 487 + 6 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (264).

It is not an unprimeable number, because it can be changed into a prime (18373487611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1921375 + ... + 1930913.

Almost surely, 2^18373487616 is an apocalyptic number.

18373487616 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 18373487616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30464272800).

18373487616 is an abundant number, since it is smaller than the sum of its proper divisors (42555057984).

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

18373487616 is a wasteful number, since it uses less digits than its factorization.

18373487616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9595 (or 9574 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The spelling of 18373487616 in words is "eighteen billion, three hundred seventy-three million, four hundred eighty-seven thousand, six hundred sixteen".