19389999998 has 16 divisors (see below), whose sum is σ = 30166845984. Its totient is φ = 9339573600.

The previous prime is 19389999991. The next prime is 19390000009. The reversal of 19389999998 is 89999998391.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19389999991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1289690 + ... + 1304637.

It is an arithmetic number, because the mean of its divisors is an integer number (1885427874).

Almost surely, 2^19389999998 is an apocalyptic number.

19389999998 is a deficient number, since it is larger than the sum of its proper divisors (10776845986).

19389999998 is a wasteful number, since it uses less digits than its factorization.

19389999998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594467.

The product of its digits is 918330048, while the sum is 83.

The spelling of 19389999998 in words is "nineteen billion, three hundred eighty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-eight".