18396996072 has 128 divisors (see below), whose sum is σ = 57323212800. Its totient is φ = 4790492928.

The previous prime is 18396996043. The next prime is 18396996089. The reversal of 18396996072 is 27069969381.

It is a junction number, because it is equal to n+sod(n) for n = 18396995997 and 18396996015.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119223 + ... + 225849.

It is an arithmetic number, because the mean of its divisors is an integer number (447837600).

Almost surely, 2^18396996072 is an apocalyptic number.

18396996072 is a gapful number since it is divisible by the number (12) 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 18396996072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28661606400).

18396996072 is an abundant number, since it is smaller than the sum of its proper divisors (38926216728).

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

18396996072 is a wasteful number, since it uses less digits than its factorization.

18396996072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106735 (or 106731 counting only the distinct ones).

The product of its (nonzero) digits is 8817984, while the sum is 60.

The spelling of 18396996072 in words is "eighteen billion, three hundred ninety-six million, nine hundred ninety-six thousand, seventy-two".