20181910219 has 8 divisors (see below), whose sum is σ = 21354193040. Its totient is φ = 19020635136.

The previous prime is 20181910201. The next prime is 20181910249. The reversal of 20181910219 is 91201918102.

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

It is a cyclic number.

It is not a de Polignac number, because 20181910219 - 2⁵ = 20181910187 is a prime.

It is a super-2 number, since 2×20181910219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20181910249) 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 in 7 ways as a sum of consecutive naturals, for example, 2748162 + ... + 2755495.

It is an arithmetic number, because the mean of its divisors is an integer number (2669274130).

Almost surely, 2^20181910219 is an apocalyptic number.

20181910219 is a deficient number, since it is larger than the sum of its proper divisors (1172282821).

20181910219 is a wasteful number, since it uses less digits than its factorization.

20181910219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5503869.

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 20181910219 in words is "twenty billion, one hundred eighty-one million, nine hundred ten thousand, two hundred nineteen".