20091001820182 has 4 divisors (see below), whose sum is σ = 30136502730276. Its totient is φ = 10045500910090.

The previous prime is 20091001820111. The next prime is 20091001820209. The reversal of 20091001820182 is 28102810019002.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5022750455044 + ... + 5022750455047.

It is an arithmetic number, because the mean of its divisors is an integer number (7534125682569).

Almost surely, 2^{20091001820182} is an apocalyptic number.

20091001820182 is a deficient number, since it is larger than the sum of its proper divisors (10045500910094).

20091001820182 is a wasteful number, since it uses less digits than its factorization.

20091001820182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10045500910093.

The product of its (nonzero) digits is 4608, while the sum is 34.

Adding to 20091001820182 its reverse (28102810019002), we get a palindrome (48193811839184).

The spelling of 20091001820182 in words is "twenty trillion, ninety-one billion, one million, eight hundred twenty thousand, one hundred eighty-two".