18948338979 has 8 divisors (see below), whose sum is σ = 25457310912. Its totient is φ = 12535796520.

The previous prime is 18948338977. The next prime is 18948338989. The reversal of 18948338979 is 97983384981.

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

It is not a de Polignac number, because 18948338979 - 2¹ = 18948338977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18948338977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24106909 + ... + 24107694.

It is an arithmetic number, because the mean of its divisors is an integer number (3182163864).

Almost surely, 2^18948338979 is an apocalyptic number.

18948338979 is a deficient number, since it is larger than the sum of its proper divisors (6508971933).

18948338979 is a wasteful number, since it uses less digits than its factorization.

18948338979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48214737.

The product of its digits is 94058496, while the sum is 69.

The spelling of 18948338979 in words is "eighteen billion, nine hundred forty-eight million, three hundred thirty-eight thousand, nine hundred seventy-nine".