27311000018 has 4 divisors (see below), whose sum is σ = 40966500030. Its totient is φ = 13655500008.

The previous prime is 27310999993. The next prime is 27311000071. The reversal of 27311000018 is 81000011372.

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 only one way, i.e., 27150141529 + 160858489 = 164773^2 + 12683^2 .

It is a super-4 number, since 4×27311000018⁴ (a number of 43 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27310999957 and 27311000002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6827750003 + ... + 6827750006.

Almost surely, 2^27311000018 is an apocalyptic number.

27311000018 is a deficient number, since it is larger than the sum of its proper divisors (13655500012).

27311000018 is a wasteful number, since it uses less digits than its factorization.

27311000018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13655500011.

The product of its (nonzero) digits is 336, while the sum is 23.

The spelling of 27311000018 in words is "twenty-seven billion, three hundred eleven million, eighteen", and thus it is an aban number.