19981830698 has 16 divisors (see below), whose sum is σ = 30729608064. Its totient is φ = 9740282880.

The previous prime is 19981830689. The next prime is 19981830733. The reversal of 19981830698 is 89603818991.

19981830698 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 19981830698.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389408 + ... + 437723.

It is an arithmetic number, because the mean of its divisors is an integer number (1920600504).

Almost surely, 2^19981830698 is an apocalyptic number.

19981830698 is a deficient number, since it is larger than the sum of its proper divisors (10747777366).

19981830698 is a wasteful number, since it uses less digits than its factorization.

19981830698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827437.

The product of its (nonzero) digits is 6718464, while the sum is 62.

The spelling of 19981830698 in words is "nineteen billion, nine hundred eighty-one million, eight hundred thirty thousand, six hundred ninety-eight".