18971672079 has 8 divisors (see below), whose sum is σ = 25651838592. Its totient is φ = 12469643480.

The previous prime is 18971672063. The next prime is 18971672119. The reversal of 18971672079 is 97027617981.

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 18971672079 - 2⁴ = 18971672063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18971672009) 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, 44534229 + ... + 44534654.

It is an arithmetic number, because the mean of its divisors is an integer number (3206479824).

Almost surely, 2^18971672079 is an apocalyptic number.

18971672079 is a deficient number, since it is larger than the sum of its proper divisors (6680166513).

18971672079 is an equidigital number, since it uses as much as digits as its factorization.

18971672079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89068957.

The product of its (nonzero) digits is 2667168, while the sum is 57.

The spelling of 18971672079 in words is "eighteen billion, nine hundred seventy-one million, six hundred seventy-two thousand, seventy-nine".