18024136516 has 27 divisors (see below), whose sum is σ = 33299156541. Its totient is φ = 8535332304.

The previous prime is 18024136513. The next prime is 18024136519. The reversal of 18024136516 is 61563142081.

It is a happy number.

The square root of 18024136516 is 134254.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (18024136513) and next prime (18024136519).

It can be written as a sum of positive squares in only one way, i.e., 14740388100 + 3283748416 = 121410^2 + 57304^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18024136513) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5099886 + ... + 5103418.

Almost surely, 2^18024136516 is an apocalyptic number.

18024136516 is the 134254-th square number.

It is an amenable number.

18024136516 is a deficient number, since it is larger than the sum of its proper divisors (15275020025).

18024136516 is an frugal number, since it uses more digits than its factorization.

18024136516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7108 (or 3554 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

Adding to 18024136516 its reverse (61563142081), we get a palindrome (79587278597).

The spelling of 18024136516 in words is "eighteen billion, twenty-four million, one hundred thirty-six thousand, five hundred sixteen".