18726479999 has 8 divisors (see below), whose sum is σ = 19979399088. Its totient is φ = 17490378880.

The previous prime is 18726479951. The next prime is 18726480001. The reversal of 18726479999 is 99997462781.

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 18726479999 - 2¹⁶ = 18726414463 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 (18726479099) 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, 4202192 + ... + 4206645.

It is an arithmetic number, because the mean of its divisors is an integer number (2497424886).

Almost surely, 2^18726479999 is an apocalyptic number.

18726479999 is a deficient number, since it is larger than the sum of its proper divisors (1252919089).

18726479999 is a wasteful number, since it uses less digits than its factorization.

18726479999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8408985.

The product of its digits is 123451776, while the sum is 71.

The spelling of 18726479999 in words is "eighteen billion, seven hundred twenty-six million, four hundred seventy-nine thousand, nine hundred ninety-nine".