18091910002 has 4 divisors (see below), whose sum is σ = 27137865006. Its totient is φ = 9045955000.

The previous prime is 18091909987. The next prime is 18091910003. The reversal of 18091910002 is 20001919081.

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., 16845184521 + 1246725481 = 129789^2 + 35309^2 .

It is not an unprimeable number, because it can be changed into a prime (18091910003) 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, 4522977499 + ... + 4522977502.

Almost surely, 2^18091910002 is an apocalyptic number.

18091910002 is a deficient number, since it is larger than the sum of its proper divisors (9045955004).

18091910002 is an equidigital number, since it uses as much as digits as its factorization.

18091910002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9045955003.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 18091910002 in words is "eighteen billion, ninety-one million, nine hundred ten thousand, two".