19398694479 has 16 divisors (see below), whose sum is σ = 26281511424. Its totient is φ = 12724896800.

The previous prime is 19398694463. The next prime is 19398694487. The reversal of 19398694479 is 97449689391.

It is a cyclic number.

It is not a de Polignac number, because 19398694479 - 2⁴ = 19398694463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19398694409) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 16609 + ... + 197669.

It is an arithmetic number, because the mean of its divisors is an integer number (1642594464).

Almost surely, 2^19398694479 is an apocalyptic number.

19398694479 is a deficient number, since it is larger than the sum of its proper divisors (6882816945).

19398694479 is a wasteful number, since it uses less digits than its factorization.

19398694479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181638.

The product of its digits is 105815808, while the sum is 69.

The spelling of 19398694479 in words is "nineteen billion, three hundred ninety-eight million, six hundred ninety-four thousand, four hundred seventy-nine".