18113242001 has 4 divisors (see below), whose sum is σ = 18273536292. Its totient is φ = 17952947712.

The previous prime is 18113241989. The next prime is 18113242129. The reversal of 18113242001 is 10024231181.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9129993601 + 8983248400 = 95551^2 + 94780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18113242001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18113242201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80146976 + ... + 80147201.

It is an arithmetic number, because the mean of its divisors is an integer number (4568384073).

Almost surely, 2^18113242001 is an apocalyptic number.

It is an amenable number.

18113242001 is a deficient number, since it is larger than the sum of its proper divisors (160294291).

18113242001 is a wasteful number, since it uses less digits than its factorization.

18113242001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160294290.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 18113242001 its reverse (10024231181), we get a palindrome (28137473182).

The spelling of 18113242001 in words is "eighteen billion, one hundred thirteen million, two hundred forty-two thousand, one".