18245578245 has 16 divisors (see below), whose sum is σ = 29196156480. Its totient is φ = 9729897984.

The previous prime is 18245578243. The next prime is 18245578289. The reversal of 18245578245 is 54287554281.

It is a happy number.

It is not a de Polignac number, because 18245578245 - 2¹ = 18245578243 is a prime.

It is a super-2 number, since 2×18245578245² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18245578243) 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 15 ways as a sum of consecutive naturals, for example, 83637 + ... + 208533.

It is an arithmetic number, because the mean of its divisors is an integer number (1824759780).

Almost surely, 2^18245578245 is an apocalyptic number.

18245578245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18245578245 is a deficient number, since it is larger than the sum of its proper divisors (10950578235).

18245578245 is a wasteful number, since it uses less digits than its factorization.

18245578245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134644.

The product of its digits is 3584000, while the sum is 51.

The spelling of 18245578245 in words is "eighteen billion, two hundred forty-five million, five hundred seventy-eight thousand, two hundred forty-five".