18473793826 has 4 divisors (see below), whose sum is σ = 27710690742. Its totient is φ = 9236896912.

The previous prime is 18473793787. The next prime is 18473793829. The reversal of 18473793826 is 62839737481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62839737481 = 3119 ⋅20147399.

It can be written as a sum of positive squares in only one way, i.e., 13389961225 + 5083832601 = 115715^2 + 71301^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18473793829) by changing a digit.

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 as a sum of consecutive naturals, namely, 4618448455 + ... + 4618448458.

Almost surely, 2^18473793826 is an apocalyptic number.

18473793826 is a deficient number, since it is larger than the sum of its proper divisors (9236896916).

18473793826 is an equidigital number, since it uses as much as digits as its factorization.

18473793826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9236896915.

The product of its digits is 12192768, while the sum is 58.

The spelling of 18473793826 in words is "eighteen billion, four hundred seventy-three million, seven hundred ninety-three thousand, eight hundred twenty-six".