19898229938 has 16 divisors (see below), whose sum is σ = 31605686784. Its totient is φ = 9363097920.

The previous prime is 19898229937. The next prime is 19898229977. The reversal of 19898229938 is 83992289891.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19898229931) 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, 771731 + ... + 797097.

It is an arithmetic number, because the mean of its divisors is an integer number (1975355424).

Almost surely, 2^19898229938 is an apocalyptic number.

19898229938 is a deficient number, since it is larger than the sum of its proper divisors (11707456846).

19898229938 is a wasteful number, since it uses less digits than its factorization.

19898229938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48457.

The product of its digits is 40310784, while the sum is 68.

The spelling of 19898229938 in words is "nineteen billion, eight hundred ninety-eight million, two hundred twenty-nine thousand, nine hundred thirty-eight".