19798797658 has 32 divisors (see below), whose sum is σ = 32070205440. Its totient is φ = 9137493360.

The previous prime is 19798797631. The next prime is 19798797659. The reversal of 19798797658 is 85679789791.

It is not an unprimeable number, because it can be changed into a prime (19798797659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373423 + ... + 423133.

It is an arithmetic number, because the mean of its divisors is an integer number (1002193920).

Almost surely, 2^19798797658 is an apocalyptic number.

19798797658 is a deficient number, since it is larger than the sum of its proper divisors (12271407782).

19798797658 is a wasteful number, since it uses less digits than its factorization.

19798797658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50002.

The product of its digits is 480090240, while the sum is 76.

The spelling of 19798797658 in words is "nineteen billion, seven hundred ninety-eight million, seven hundred ninety-seven thousand, six hundred fifty-eight".