18700854672647 has 16 divisors (see below), whose sum is σ = 22062304223232. Its totient is φ = 15511901708160.

The previous prime is 18700854672559. The next prime is 18700854672727. The reversal of 18700854672647 is 74627645800781.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18700854672647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18700854612647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9657938 + ... + 11431424.

It is an arithmetic number, because the mean of its divisors is an integer number (1378894013952).

Almost surely, 2^{18700854672647} is an apocalyptic number.

18700854672647 is a deficient number, since it is larger than the sum of its proper divisors (3361449550585).

18700854672647 is a wasteful number, since it uses less digits than its factorization.

18700854672647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822118.

The product of its (nonzero) digits is 126443520, while the sum is 65.

The spelling of 18700854672647 in words is "eighteen trillion, seven hundred billion, eight hundred fifty-four million, six hundred seventy-two thousand, six hundred forty-seven".