18018766080 has 648 divisors, whose sum is σ = 73364388552. Its totient is φ = 4070965248.

The previous prime is 18018766063. The next prime is 18018766093. The reversal of 18018766080 is 8066781081.

It can be written as a sum of positive squares in 4 ways, for example, as 759112704 + 17259653376 = 27552^2 + 131376^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 77333644 + ... + 77333876.

It is an arithmetic number, because the mean of its divisors is an integer number (113216649).

Almost surely, 2^18018766080 is an apocalyptic number.

18018766080 is a gapful number since it is divisible by the number (10) 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 18018766080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36682194276).

18018766080 is an abundant number, since it is smaller than the sum of its proper divisors (55345622472).

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

18018766080 is a wasteful number, since it uses less digits than its factorization.

18018766080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The spelling of 18018766080 in words is "eighteen billion, eighteen million, seven hundred sixty-six thousand, eighty".