18278815486 has 16 divisors (see below), whose sum is σ = 27612090000. Its totient is φ = 9074829568.

The previous prime is 18278815441. The next prime is 18278815501. The reversal of 18278815486 is 68451887281.

It is a self number, because there is not a number n which added to its sum of digits gives 18278815486.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 973806 + ... + 992398.

It is an arithmetic number, because the mean of its divisors is an integer number (1725755625).

Almost surely, 2^18278815486 is an apocalyptic number.

18278815486 is a deficient number, since it is larger than the sum of its proper divisors (9333274514).

18278815486 is a wasteful number, since it uses less digits than its factorization.

18278815486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22043.

The product of its digits is 6881280, while the sum is 58.

The spelling of 18278815486 in words is "eighteen billion, two hundred seventy-eight million, eight hundred fifteen thousand, four hundred eighty-six".