18700084765 has 4 divisors (see below), whose sum is σ = 22440101724. Its totient is φ = 14960067808.

The previous prime is 18700084723. The next prime is 18700084769. The reversal of 18700084765 is 56748000781.

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 2131761241 + 16568323524 = 46171^2 + 128718^2 .

It is a cyclic number.

It is not a de Polignac number, because 18700084765 - 2²⁹ = 18163213853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18700084769) by changing a digit.

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, 1870008472 + ... + 1870008481.

It is an arithmetic number, because the mean of its divisors is an integer number (5610025431).

Almost surely, 2^18700084765 is an apocalyptic number.

It is an amenable number.

18700084765 is a deficient number, since it is larger than the sum of its proper divisors (3740016959).

18700084765 is an equidigital number, since it uses as much as digits as its factorization.

18700084765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3740016958.

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 18700084765 in words is "eighteen billion, seven hundred million, eighty-four thousand, seven hundred sixty-five".