19434657998 has 16 divisors (see below), whose sum is σ = 33717962880. Its totient is φ = 8228787576.

The previous prime is 19434657971. The next prime is 19434658007. The reversal of 19434657998 is 89975643491.

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 7 ways as a sum of consecutive naturals, for example, 8361428 + ... + 8363751.

It is an arithmetic number, because the mean of its divisors is an integer number (2107372680).

Almost surely, 2^19434657998 is an apocalyptic number.

19434657998 is a deficient number, since it is larger than the sum of its proper divisors (14283304882).

19434657998 is a wasteful number, since it uses less digits than its factorization.

19434657998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16725271.

The product of its digits is 58786560, while the sum is 65.

The spelling of 19434657998 in words is "nineteen billion, four hundred thirty-four million, six hundred fifty-seven thousand, nine hundred ninety-eight".