18073078539634 has 4 divisors (see below), whose sum is σ = 27109617809454. Its totient is φ = 9036539269816.

The previous prime is 18073078539631. The next prime is 18073078539641. The reversal of 18073078539634 is 43693587037081.

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., 17048434550625 + 1024643989009 = 4128975^2 + 1012247^2 .

It is not an unprimeable number, because it can be changed into a prime (18073078539631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4518269634907 + ... + 4518269634910.

Almost surely, 2^{18073078539634} is an apocalyptic number.

18073078539634 is a deficient number, since it is larger than the sum of its proper divisors (9036539269820).

18073078539634 is an equidigital number, since it uses as much as digits as its factorization.

18073078539634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9036539269819.

The product of its (nonzero) digits is 91445760, while the sum is 64.

The spelling of 18073078539634 in words is "eighteen trillion, seventy-three billion, seventy-eight million, five hundred thirty-nine thousand, six hundred thirty-four".