18825900194 has 4 divisors (see below), whose sum is σ = 28238850294. Its totient is φ = 9412950096.

The previous prime is 18825900179. The next prime is 18825900221. The reversal of 18825900194 is 49100952881.

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., 12936105169 + 5889795025 = 113737^2 + 76745^2 .

It is a super-2 number, since 2×18825900194² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4706475047 + ... + 4706475050.

Almost surely, 2^18825900194 is an apocalyptic number.

18825900194 is a deficient number, since it is larger than the sum of its proper divisors (9412950100).

18825900194 is an equidigital number, since it uses as much as digits as its factorization.

18825900194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9412950099.

The product of its (nonzero) digits is 207360, while the sum is 47.

The spelling of 18825900194 in words is "eighteen billion, eight hundred twenty-five million, nine hundred thousand, one hundred ninety-four".