100505001919 has 4 divisors (see below), whose sum is σ = 114862859344. Its totient is φ = 86147144496.

The previous prime is 100505001913. The next prime is 100505001973. The reversal of 100505001919 is 919100505001.

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

It is not a de Polignac number, because 100505001919 - 2⁵ = 100505001887 is a prime.

It is a super-2 number, since 2×100505001919² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100505001913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7178928702 + ... + 7178928715.

It is an arithmetic number, because the mean of its divisors is an integer number (28715714836).

Almost surely, 2^100505001919 is an apocalyptic number.

100505001919 is a deficient number, since it is larger than the sum of its proper divisors (14357857425).

100505001919 is an equidigital number, since it uses as much as digits as its factorization.

100505001919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14357857424.

The product of its (nonzero) digits is 2025, while the sum is 31.

The spelling of 100505001919 in words is "one hundred billion, five hundred five million, one thousand, nine hundred nineteen".