18002399038 has 16 divisors (see below), whose sum is σ = 29479168656. Its totient is φ = 8194979520.

The previous prime is 18002399021. The next prime is 18002399119. The reversal of 18002399038 is 83099320081.

It is a happy number.

It is a super-2 number, since 2×18002399038² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18002398985 and 18002399003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4740568 + ... + 4744363.

It is an arithmetic number, because the mean of its divisors is an integer number (1842448041).

Almost surely, 2^18002399038 is an apocalyptic number.

18002399038 is a deficient number, since it is larger than the sum of its proper divisors (11476769618).

18002399038 is a wasteful number, since it uses less digits than its factorization.

18002399038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9485019.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 18002399038 in words is "eighteen billion, two million, three hundred ninety-nine thousand, thirty-eight".