18033518412 has 216 divisors, whose sum is σ = 60113180400. Its totient is φ = 4505663232.

The previous prime is 18033518401. The next prime is 18033518429. The reversal of 18033518412 is 21481533081.

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 415014 + ... + 456402.

Almost surely, 2^18033518412 is an apocalyptic number.

18033518412 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 18033518412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30056590200).

18033518412 is an abundant number, since it is smaller than the sum of its proper divisors (42079661988).

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

18033518412 is a wasteful number, since it uses less digits than its factorization.

18033518412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41445 (or 41433 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 18033518412 in words is "eighteen billion, thirty-three million, five hundred eighteen thousand, four hundred twelve".