18226499425 has 12 divisors (see below), whose sum is σ = 23930322156. Its totient is φ = 13723481600.

The previous prime is 18226499393. The next prime is 18226499429. The reversal of 18226499425 is 52499462281.

It can be written as a sum of positive squares in 6 ways, for example, as 72709729 + 18153789696 = 8527^2 + 134736^2 .

It is not a de Polignac number, because 18226499425 - 2⁵ = 18226499393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18226499429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21442516 + ... + 21443365.

It is an arithmetic number, because the mean of its divisors is an integer number (1994193513).

Almost surely, 2^18226499425 is an apocalyptic number.

It is an amenable number.

18226499425 is a deficient number, since it is larger than the sum of its proper divisors (5703822731).

18226499425 is a wasteful number, since it uses less digits than its factorization.

18226499425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42885908 (or 42885903 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 52.

The spelling of 18226499425 in words is "eighteen billion, two hundred twenty-six million, four hundred ninety-nine thousand, four hundred twenty-five".