19964494167 has 8 divisors (see below), whose sum is σ = 26670225024. Its totient is φ = 13284213048.

The previous prime is 19964494139. The next prime is 19964494177. The reversal of 19964494167 is 76149446991.

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

It is not a de Polignac number, because 19964494167 - 2⁶ = 19964494103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19964494167.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19964494127) 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 7 ways as a sum of consecutive naturals, for example, 6360603 + ... + 6363740.

It is an arithmetic number, because the mean of its divisors is an integer number (3333778128).

Almost surely, 2^19964494167 is an apocalyptic number.

19964494167 is a deficient number, since it is larger than the sum of its proper divisors (6705730857).

19964494167 is a wasteful number, since it uses less digits than its factorization.

19964494167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12724869.

The product of its digits is 11757312, while the sum is 60.

The spelling of 19964494167 in words is "nineteen billion, nine hundred sixty-four million, four hundred ninety-four thousand, one hundred sixty-seven".