100019918 has 8 divisors (see below), whose sum is σ = 150115680. Its totient is φ = 49981360.

The previous prime is 100019911. The next prime is 100019921. The reversal of 100019918 is 819910001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100019911) 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 in 3 ways as a sum of consecutive naturals, for example, 9623 + ... + 17106.

It is an arithmetic number, because the mean of its divisors is an integer number (18764460).

Almost surely, 2^100019918 is an apocalyptic number.

100019918 is a deficient number, since it is larger than the sum of its proper divisors (50095762).

100019918 is a wasteful number, since it uses less digits than its factorization.

100019918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28602.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 100019918 is about 10000.9958504141. The cubic root of 100019918 is about 464.1896983709.

Adding to 100019918 its reverse (819910001), we get a palindrome (919929919).

The spelling of 100019918 in words is "one hundred million, nineteen thousand, nine hundred eighteen".