18467042645 has 4 divisors (see below), whose sum is σ = 22160451180. Its totient is φ = 14773634112.

The previous prime is 18467042639. The next prime is 18467042683. The reversal of 18467042645 is 54624076481.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3705278641 + 14761764004 = 60871^2 + 121498^2 .

It is a cyclic number.

It is not a de Polignac number, because 18467042645 - 2⁸ = 18467042389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18467042645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1846704260 + ... + 1846704269.

It is an arithmetic number, because the mean of its divisors is an integer number (5540112795).

Almost surely, 2^18467042645 is an apocalyptic number.

It is an amenable number.

18467042645 is a deficient number, since it is larger than the sum of its proper divisors (3693408535).

18467042645 is an equidigital number, since it uses as much as digits as its factorization.

18467042645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693408534.

The product of its (nonzero) digits is 1290240, while the sum is 47.

The spelling of 18467042645 in words is "eighteen billion, four hundred sixty-seven million, forty-two thousand, six hundred forty-five".