18033212736 has 756 divisors, whose sum is σ = 69205534944. Its totient is φ = 4557358080.

The previous prime is 18033212611. The next prime is 18033212753. The reversal of 18033212736 is 63721233081.

It is a tau number, because it is divible by the number of its divisors (756).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18033212736.

It is a congruent number.

It is an unprimeable number.

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 107 ways as a sum of consecutive naturals, for example, 487384110 + ... + 487384146.

Almost surely, 2^18033212736 is an apocalyptic number.

18033212736 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 18033212736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34602767472).

18033212736 is an abundant number, since it is smaller than the sum of its proper divisors (51172322208).

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

18033212736 is an equidigital number, since it uses as much as digits as its factorization.

18033212736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 18033212736 in words is "eighteen billion, thirty-three million, two hundred twelve thousand, seven hundred thirty-six".