18334258449 has 16 divisors (see below), whose sum is σ = 27711700800. Its totient is φ = 10688798016.

The previous prime is 18334258399. The next prime is 18334258451. The reversal of 18334258449 is 94485243381.

It is not a de Polignac number, because 18334258449 - 2¹¹ = 18334256401 is a prime.

It is a super-2 number, since 2×18334258449² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18334258469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12370554 + ... + 12372035.

It is an arithmetic number, because the mean of its divisors is an integer number (1731981300).

Almost surely, 2^18334258449 is an apocalyptic number.

18334258449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18334258449 is a deficient number, since it is larger than the sum of its proper divisors (9377442351).

18334258449 is a wasteful number, since it uses less digits than its factorization.

18334258449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24742624.

The product of its digits is 3317760, while the sum is 51.

The spelling of 18334258449 in words is "eighteen billion, three hundred thirty-four million, two hundred fifty-eight thousand, four hundred forty-nine".