18383846786 has 4 divisors (see below), whose sum is σ = 27575770182. Its totient is φ = 9191923392.

The previous prime is 18383846737. The next prime is 18383846797. The reversal of 18383846786 is 68764838381.

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

It can be written as a sum of positive squares in only one way, i.e., 11920490761 + 6463356025 = 109181^2 + 80395^2 .

It is a super-2 number, since 2×18383846786² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4595961695 + ... + 4595961698.

Almost surely, 2^18383846786 is an apocalyptic number.

18383846786 is a deficient number, since it is larger than the sum of its proper divisors (9191923396).

18383846786 is an equidigital number, since it uses as much as digits as its factorization.

18383846786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9191923395.

The product of its digits is 37158912, while the sum is 62.

The spelling of 18383846786 in words is "eighteen billion, three hundred eighty-three million, eight hundred forty-six thousand, seven hundred eighty-six".