15283438018 has 4 divisors (see below), whose sum is σ = 22925157030. Its totient is φ = 7641719008.

The previous prime is 15283437991. The next prime is 15283438043. The reversal of 15283438018 is 81083438251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81083438251 = 242197 ⋅334783.

It can be written as a sum of positive squares in only one way, i.e., 9296237889 + 5987200129 = 96417^2 + 77377^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3820859503 + ... + 3820859506.

Almost surely, 2^15283438018 is an apocalyptic number.

15283438018 is a deficient number, since it is larger than the sum of its proper divisors (7641719012).

15283438018 is an equidigital number, since it uses as much as digits as its factorization.

15283438018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7641719011.

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 15283438018 in words is "fifteen billion, two hundred eighty-three million, four hundred thirty-eight thousand, eighteen".