18826138938 has 8 divisors (see below), whose sum is σ = 37652277888. Its totient is φ = 6275379644.

The previous prime is 18826138907. The next prime is 18826138943. The reversal of 18826138938 is 83983162881.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

18826138938 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1568844906 + ... + 1568844917.

It is an arithmetic number, because the mean of its divisors is an integer number (4706534736).

Almost surely, 2^18826138938 is an apocalyptic number.

18826138938 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18826138938 is a wasteful number, since it uses less digits than its factorization.

18826138938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3137689828.

The product of its digits is 3981312, while the sum is 57.

The spelling of 18826138938 in words is "eighteen billion, eight hundred twenty-six million, one hundred thirty-eight thousand, nine hundred thirty-eight".