18363833409 has 8 divisors (see below), whose sum is σ = 24487537120. Its totient is φ = 12241342656.

The previous prime is 18363833339. The next prime is 18363833417. The reversal of 18363833409 is 90433836381.

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

It is not a de Polignac number, because 18363833409 - 2¹⁹ = 18363309121 is a prime.

It is a super-2 number, since 2×18363833409² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18363833459) 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, 267304 + ... + 328905.

It is an arithmetic number, because the mean of its divisors is an integer number (3060942140).

Almost surely, 2^18363833409 is an apocalyptic number.

It is an amenable number.

18363833409 is a deficient number, since it is larger than the sum of its proper divisors (6123703711).

18363833409 is a wasteful number, since it uses less digits than its factorization.

18363833409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606479.

The product of its (nonzero) digits is 1119744, while the sum is 48.

The spelling of 18363833409 in words is "eighteen billion, three hundred sixty-three million, eight hundred thirty-three thousand, four hundred nine".