19818869318 has 8 divisors (see below), whose sum is σ = 29728912248. Its totient is φ = 9909231904.

The previous prime is 19818869309. The next prime is 19818869339. The reversal of 19818869318 is 81396881891.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104105 + ... + 224667.

It is an arithmetic number, because the mean of its divisors is an integer number (3716114031).

Almost surely, 2^19818869318 is an apocalyptic number.

19818869318 is a deficient number, since it is larger than the sum of its proper divisors (9910042930).

19818869318 is a wasteful number, since it uses less digits than its factorization.

19818869318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202758.

The product of its digits is 5971968, while the sum is 62.

The spelling of 19818869318 in words is "nineteen billion, eight hundred eighteen million, eight hundred sixty-nine thousand, three hundred eighteen".