18027315278 has 16 divisors (see below), whose sum is σ = 30945805440. Its totient is φ = 7715533176.

The previous prime is 18027315277. The next prime is 18027315281. The reversal of 18027315278 is 87251372081.

It is a super-2 number, since 2×18027315278² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18027315277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 860876 + ... + 881567.

It is an arithmetic number, because the mean of its divisors is an integer number (1934112840).

Almost surely, 2^18027315278 is an apocalyptic number.

18027315278 is a deficient number, since it is larger than the sum of its proper divisors (12918490162).

18027315278 is a wasteful number, since it uses less digits than its factorization.

18027315278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743191.

The product of its (nonzero) digits is 188160, while the sum is 44.

The spelling of 18027315278 in words is "eighteen billion, twenty-seven million, three hundred fifteen thousand, two hundred seventy-eight".