18323121669 has 8 divisors (see below), whose sum is σ = 24446038080. Its totient is φ = 12207809856.

The previous prime is 18323121587. The next prime is 18323121683. The reversal of 18323121669 is 96612132381.

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

It is not a de Polignac number, because 18323121669 - 2¹¹ = 18323119621 is a prime.

It is a super-2 number, since 2×18323121669² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18323121669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18323121689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1895524 + ... + 1905165.

It is an arithmetic number, because the mean of its divisors is an integer number (3055754760).

Almost surely, 2^18323121669 is an apocalyptic number.

It is an amenable number.

18323121669 is a deficient number, since it is larger than the sum of its proper divisors (6122916411).

18323121669 is a wasteful number, since it uses less digits than its factorization.

18323121669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3802299.

The product of its digits is 93312, while the sum is 42.

The spelling of 18323121669 in words is "eighteen billion, three hundred twenty-three million, one hundred twenty-one thousand, six hundred sixty-nine".