19999959998 has 8 divisors (see below), whose sum is σ = 30280313592. Its totient is φ = 9906522136.

The previous prime is 19999959977. The next prime is 19999960003. The reversal of 19999959998 is 89995999991.

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

It is a Curzon number.

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, 46728665 + ... + 46729092.

It is an arithmetic number, because the mean of its divisors is an integer number (3785039199).

Almost surely, 2^19999959998 is an apocalyptic number.

19999959998 is a deficient number, since it is larger than the sum of its proper divisors (10280353594).

19999959998 is a wasteful number, since it uses less digits than its factorization.

19999959998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93457866.

The product of its digits is 1721868840, while the sum is 86.

The spelling of 19999959998 in words is "nineteen billion, nine hundred ninety-nine million, nine hundred fifty-nine thousand, nine hundred ninety-eight".