18867038627434 has 4 divisors (see below), whose sum is σ = 28300557941154. Its totient is φ = 9433519313716.

The previous prime is 18867038627431. The next prime is 18867038627441. The reversal of 18867038627434 is 43472683076881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12931554026209 + 5935484601225 = 3596047^2 + 2436285^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18867038627434.

It is not an unprimeable number, because it can be changed into a prime (18867038627431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4716759656857 + ... + 4716759656860.

Almost surely, 2^{18867038627434} is an apocalyptic number.

18867038627434 is a deficient number, since it is larger than the sum of its proper divisors (9433519313720).

18867038627434 is an equidigital number, since it uses as much as digits as its factorization.

18867038627434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9433519313719.

The product of its (nonzero) digits is 260112384, while the sum is 67.

The spelling of 18867038627434 in words is "eighteen trillion, eight hundred sixty-seven billion, thirty-eight million, six hundred twenty-seven thousand, four hundred thirty-four".