18144451138 has 32 divisors (see below), whose sum is σ = 29955391488. Its totient is φ = 8174149200.

The previous prime is 18144451123. The next prime is 18144451151. The reversal of 18144451138 is 83115444181.

It is a super-2 number, since 2×18144451138² (a number of 21 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 18144451138.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3313743 + ... + 3319213.

It is an arithmetic number, because the mean of its divisors is an integer number (936105984).

Almost surely, 2^18144451138 is an apocalyptic number.

18144451138 is a deficient number, since it is larger than the sum of its proper divisors (11810940350).

18144451138 is a wasteful number, since it uses less digits than its factorization.

18144451138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6798.

The product of its digits is 61440, while the sum is 40.

The spelling of 18144451138 in words is "eighteen billion, one hundred forty-four million, four hundred fifty-one thousand, one hundred thirty-eight".