18037632241 has 4 divisors (see below), whose sum is σ = 18047994484. Its totient is φ = 18027270000.

The previous prime is 18037632211. The next prime is 18037632253. The reversal of 18037632241 is 14223673081.

It is a happy number.

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 6352887025 + 11684745216 = 79705^2 + 108096^2 .

It is a cyclic number.

It is not a de Polignac number, because 18037632241 - 2⁷ = 18037632113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18037632241.

It is not an unprimeable number, because it can be changed into a prime (18037632211) 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, 5178510 + ... + 5181991.

It is an arithmetic number, because the mean of its divisors is an integer number (4511998621).

Almost surely, 2^18037632241 is an apocalyptic number.

It is an amenable number.

18037632241 is a deficient number, since it is larger than the sum of its proper divisors (10362243).

18037632241 is a wasteful number, since it uses less digits than its factorization.

18037632241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10362242.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 18037632241 in words is "eighteen billion, thirty-seven million, six hundred thirty-two thousand, two hundred forty-one".