18948733979 has 4 divisors (see below), whose sum is σ = 21655695984. Its totient is φ = 16241771976.

The previous prime is 18948733901. The next prime is 18948734033. The reversal of 18948733979 is 97933784981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18948733979 - 2²⁰ = 18947685403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18948735979) 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 3 ways as a sum of consecutive naturals, for example, 1353480992 + ... + 1353481005.

It is an arithmetic number, because the mean of its divisors is an integer number (5413923996).

Almost surely, 2^18948733979 is an apocalyptic number.

18948733979 is a deficient number, since it is larger than the sum of its proper divisors (2706962005).

18948733979 is an equidigital number, since it uses as much as digits as its factorization.

18948733979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706962004.

The product of its digits is 82301184, while the sum is 68.

The spelling of 18948733979 in words is "eighteen billion, nine hundred forty-eight million, seven hundred thirty-three thousand, nine hundred seventy-nine".