10218945380806 has 4 divisors (see below), whose sum is σ = 15328418071212. Its totient is φ = 5109472690402.

The previous prime is 10218945380803. The next prime is 10218945380807. The reversal of 10218945380806 is 60808354981201.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10218945380803) 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, 2554736345200 + ... + 2554736345203.

It is an arithmetic number, because the mean of its divisors is an integer number (3832104517803).

Almost surely, 2^{10218945380806} is an apocalyptic number.

10218945380806 is a deficient number, since it is larger than the sum of its proper divisors (5109472690406).

10218945380806 is an equidigital number, since it uses as much as digits as its factorization.

10218945380806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5109472690405.

The product of its (nonzero) digits is 3317760, while the sum is 55.

The spelling of 10218945380806 in words is "ten trillion, two hundred eighteen billion, nine hundred forty-five million, three hundred eighty thousand, eight hundred six".