18225307635 has 24 divisors (see below), whose sum is σ = 29645175504. Its totient is φ = 9558674880.

The previous prime is 18225307591. The next prime is 18225307643. The reversal of 18225307635 is 53670352281.

It is a happy number.

It is not a de Polignac number, because 18225307635 - 2¹¹ = 18225305587 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4081414 + ... + 4085876.

It is an arithmetic number, because the mean of its divisors is an integer number (1235215646).

Almost surely, 2^18225307635 is an apocalyptic number.

18225307635 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18225307635 is a deficient number, since it is larger than the sum of its proper divisors (11419867869).

18225307635 is an frugal number, since it uses more digits than its factorization.

18225307635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8995 (or 4532 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 18225307635 in words is "eighteen billion, two hundred twenty-five million, three hundred seven thousand, six hundred thirty-five".