19973479679 has 8 divisors (see below), whose sum is σ = 20283638400. Its totient is φ = 19663675416.

The previous prime is 19973479663. The next prime is 19973479699. The reversal of 19973479679 is 97697437991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19973479679 - 2⁴ = 19973479663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19973479699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26102 + ... + 201564.

It is an arithmetic number, because the mean of its divisors is an integer number (2535454800).

Almost surely, 2^19973479679 is an apocalyptic number.

19973479679 is a deficient number, since it is larger than the sum of its proper divisors (310158721).

19973479679 is a wasteful number, since it uses less digits than its factorization.

19973479679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177229.

The product of its digits is 162030456, while the sum is 71.

The spelling of 19973479679 in words is "nineteen billion, nine hundred seventy-three million, four hundred seventy-nine thousand, six hundred seventy-nine".