18266244160 has 56 divisors (see below), whose sum is σ = 43665937560. Its totient is φ = 7278034944.

The previous prime is 18266244151. The next prime is 18266244163. The reversal of 18266244160 is 6144266281.

It can be written as a sum of positive squares in 4 ways, for example, as 8765453376 + 9500790784 = 93624^2 + 97472^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (18266244163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28815 + ... + 193294.

It is an arithmetic number, because the mean of its divisors is an integer number (779748885).

Almost surely, 2^18266244160 is an apocalyptic number.

18266244160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18266244160 is an abundant number, since it is smaller than the sum of its proper divisors (25399693400).

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

18266244160 is a wasteful number, since it uses less digits than its factorization.

18266244160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222383 (or 222373 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 18266244160 in words is "eighteen billion, two hundred sixty-six million, two hundred forty-four thousand, one hundred sixty".