18268821479 has 8 divisors (see below), whose sum is σ = 18312577920. Its totient is φ = 18225113976.

The previous prime is 18268821427. The next prime is 18268821481. The reversal of 18268821479 is 97412886281.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18268821479 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 (18268821679) 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, 798254 + ... + 820820.

It is an arithmetic number, because the mean of its divisors is an integer number (2289072240).

Almost surely, 2^18268821479 is an apocalyptic number.

18268821479 is a deficient number, since it is larger than the sum of its proper divisors (43756441).

18268821479 is a wasteful number, since it uses less digits than its factorization.

18268821479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24469.

The product of its digits is 3096576, while the sum is 56.

The spelling of 18268821479 in words is "eighteen billion, two hundred sixty-eight million, eight hundred twenty-one thousand, four hundred seventy-nine".