19021816218 has 64 divisors (see below), whose sum is σ = 41070458880. Its totient is φ = 5854291200.

The previous prime is 19021816141. The next prime is 19021816279. The reversal of 19021816218 is 81261812091.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1283913 + ... + 1298643.

It is an arithmetic number, because the mean of its divisors is an integer number (641725920).

Almost surely, 2^19021816218 is an apocalyptic number.

19021816218 is an abundant number, since it is smaller than the sum of its proper divisors (22048642662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19021816218 is a wasteful number, since it uses less digits than its factorization.

19021816218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15043.

The product of its (nonzero) digits is 13824, while the sum is 39.

The spelling of 19021816218 in words is "nineteen billion, twenty-one million, eight hundred sixteen thousand, two hundred eighteen".