18244702242 has 162 divisors, whose sum is σ = 44797186161. Its totient is φ = 5363897760.

The previous prime is 18244702241. The next prime is 18244702283. The reversal of 18244702242 is 24220744281.

18244702242 is a `hidden beast` number, since 182 + 4 + 470 + 2 + 2 + 4 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15599760201 + 2644942041 = 124899^2 + 51429^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=95511.

It is a junction number, because it is equal to n+sod(n) for n = 18244702197 and 18244702206.

It is not an unprimeable number, because it can be changed into a prime (18244702241) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 230945559 + ... + 230945637.

Almost surely, 2^18244702242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18244702242

18244702242 is an abundant number, since it is smaller than the sum of its proper divisors (26552483919).

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

18244702242 is a wasteful number, since it uses less digits than its factorization.

18244702242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 36.

The spelling of 18244702242 in words is "eighteen billion, two hundred forty-four million, seven hundred two thousand, two hundred forty-two".