18505670242 has 8 divisors (see below), whose sum is σ = 27788007132. Its totient is φ = 9243001200.

The previous prime is 18505670237. The next prime is 18505670273. The reversal of 18505670242 is 24207650581.

It can be written as a sum of positive squares in 2 ways, for example, as 15430856841 + 3074813401 = 124221^2 + 55451^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18505670242² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18505670195 and 18505670204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4914609 + ... + 4918372.

Almost surely, 2^18505670242 is an apocalyptic number.

18505670242 is a deficient number, since it is larger than the sum of its proper divisors (9282336890).

18505670242 is an equidigital number, since it uses as much as digits as its factorization.

18505670242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9833924.

The product of its (nonzero) digits is 134400, while the sum is 40.

The spelling of 18505670242 in words is "eighteen billion, five hundred five million, six hundred seventy thousand, two hundred forty-two".