18201442516 has 24 divisors (see below), whose sum is σ = 31927649544. Its totient is φ = 9079282560.

The previous prime is 18201442481. The next prime is 18201442529. The reversal of 18201442516 is 61524410281.

It can be written as a sum of positive squares in 4 ways, for example, as 38489616 + 18162952900 = 6204^2 + 134770^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4524586 + ... + 4528606.

It is an arithmetic number, because the mean of its divisors is an integer number (1330318731).

Almost surely, 2^18201442516 is an apocalyptic number.

It is an amenable number.

18201442516 is a deficient number, since it is larger than the sum of its proper divisors (13726207028).

18201442516 is a wasteful number, since it uses less digits than its factorization.

18201442516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6411 (or 6409 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

Adding to 18201442516 its reverse (61524410281), we get a palindrome (79725852797).

The spelling of 18201442516 in words is "eighteen billion, two hundred one million, four hundred forty-two thousand, five hundred sixteen".