19994324218 has 8 divisors (see below), whose sum is σ = 32717985120. Its totient is φ = 9088329180.

The previous prime is 19994324177. The next prime is 19994324219. The reversal of 19994324218 is 81242349991.

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

It is not an unprimeable number, because it can be changed into a prime (19994324219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454416438 + ... + 454416481.

It is an arithmetic number, because the mean of its divisors is an integer number (4089748140).

Almost surely, 2^19994324218 is an apocalyptic number.

19994324218 is a deficient number, since it is larger than the sum of its proper divisors (12723660902).

19994324218 is a wasteful number, since it uses less digits than its factorization.

19994324218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908832932.

The product of its digits is 1119744, while the sum is 52.

The spelling of 19994324218 in words is "nineteen billion, nine hundred ninety-four million, three hundred twenty-four thousand, two hundred eighteen".