18138702216514 has 16 divisors (see below), whose sum is σ = 29788666203456. Its totient is φ = 8215099786800.

The previous prime is 18138702216497. The next prime is 18138702216553. The reversal of 18138702216514 is 41561220783181.

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, 1488236622 + ... + 1488248809.

It is an arithmetic number, because the mean of its divisors is an integer number (1861791637716).

Almost surely, 2^{18138702216514} is an apocalyptic number.

18138702216514 is a deficient number, since it is larger than the sum of its proper divisors (11649963986942).

18138702216514 is a wasteful number, since it uses less digits than its factorization.

18138702216514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976485721.

The product of its (nonzero) digits is 645120, while the sum is 49.

Adding to 18138702216514 its reverse (41561220783181), we get a palindrome (59699922999695).

The spelling of 18138702216514 in words is "eighteen trillion, one hundred thirty-eight billion, seven hundred two million, two hundred sixteen thousand, five hundred fourteen".