18700860661045 has 4 divisors (see below), whose sum is σ = 22441032793260. Its totient is φ = 14960688528832.

The previous prime is 18700860661019. The next prime is 18700860661097. The reversal of 18700860661045 is 54016606800781.

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 5296175000964 + 13404685660081 = 2301342^2 + 3661241^2 .

It is a cyclic number.

It is not a de Polignac number, because 18700860661045 - 2⁵ = 18700860661013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18700860660983 and 18700860661001.

It is a congruent number.

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, 1870086066100 + ... + 1870086066109.

It is an arithmetic number, because the mean of its divisors is an integer number (5610258198315).

Almost surely, 2^{18700860661045} is an apocalyptic number.

It is an amenable number.

18700860661045 is a deficient number, since it is larger than the sum of its proper divisors (3740172132215).

18700860661045 is an equidigital number, since it uses as much as digits as its factorization.

18700860661045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3740172132214.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 18700860661045 in words is "eighteen trillion, seven hundred billion, eight hundred sixty million, six hundred sixty-one thousand, forty-five".