18871003676818 has 8 divisors (see below), whose sum is σ = 28320852457548. Its totient is φ = 9430719524304.

The previous prime is 18871003676809. The next prime is 18871003676843. The reversal of 18871003676818 is 81867630017881.

It can be written as a sum of positive squares in 2 ways, for example, as 17847270507609 + 1023733169209 = 4224603^2 + 1011797^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18871003676818² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18871003676818.

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, 2391152121 + ... + 2391160012.

Almost surely, 2^{18871003676818} is an apocalyptic number.

18871003676818 is a deficient number, since it is larger than the sum of its proper divisors (9449848780730).

18871003676818 is a wasteful number, since it uses less digits than its factorization.

18871003676818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4782314108.

The product of its (nonzero) digits is 21676032, while the sum is 64.

The spelling of 18871003676818 in words is "eighteen trillion, eight hundred seventy-one billion, three million, six hundred seventy-six thousand, eight hundred eighteen".