100020195218 has 4 divisors (see below), whose sum is σ = 150030292830. Its totient is φ = 50010097608.

The previous prime is 100020195217. The next prime is 100020195239. The reversal of 100020195218 is 812591020001.

100020195218 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812591020001 = 797 ⋅1019562133.

It can be written as a sum of positive squares in only one way, i.e., 53978622889 + 46041572329 = 232333^2 + 214573^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (100020195217) by changing a digit.

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, 25005048803 + ... + 25005048806.

Almost surely, 2^100020195218 is an apocalyptic number.

100020195218 is a deficient number, since it is larger than the sum of its proper divisors (50010097612).

100020195218 is an equidigital number, since it uses as much as digits as its factorization.

100020195218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50010097611.

The product of its (nonzero) digits is 1440, while the sum is 29.

The spelling of 100020195218 in words is "one hundred billion, twenty million, one hundred ninety-five thousand, two hundred eighteen".