18780201216 has 360 divisors, whose sum is σ = 64640600640. Its totient is φ = 5312065536.

The previous prime is 18780201197. The next prime is 18780201221. The reversal of 18780201216 is 61210208781.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15820975 + ... + 15822161.

It is an arithmetic number, because the mean of its divisors is an integer number (179557224).

Almost surely, 2^18780201216 is an apocalyptic number.

18780201216 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 18780201216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32320300320).

18780201216 is an abundant number, since it is smaller than the sum of its proper divisors (45860399424).

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

18780201216 is a wasteful number, since it uses less digits than its factorization.

18780201216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331 (or 1308 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

Adding to 18780201216 its reverse (61210208781), we get a palindrome (79990409997).

The spelling of 18780201216 in words is "eighteen billion, seven hundred eighty million, two hundred one thousand, two hundred sixteen".