18383938382 has 16 divisors (see below), whose sum is σ = 27699298704. Its totient is φ = 9150864000.

The previous prime is 18383938369. The next prime is 18383938409. The reversal of 18383938382 is 28383938381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2952032 + ... + 2958252.

It is an arithmetic number, because the mean of its divisors is an integer number (1731206169).

Almost surely, 2^18383938382 is an apocalyptic number.

18383938382 is a deficient number, since it is larger than the sum of its proper divisors (9315360322).

18383938382 is a wasteful number, since it uses less digits than its factorization.

18383938382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12595.

The product of its digits is 5971968, while the sum is 56.

Subtracting 18383938382 from its reverse (28383938381), we obtain a palindrome (9999999999).

The spelling of 18383938382 in words is "eighteen billion, three hundred eighty-three million, nine hundred thirty-eight thousand, three hundred eighty-two".