18265225844117 has 16 divisors (see below), whose sum is σ = 20923177875072. Its totient is φ = 15619460143680.

The previous prime is 18265225844087. The next prime is 18265225844123. The reversal of 18265225844117 is 71144852256281.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18265225844117 - 2¹⁸ = 18265225581973 is a prime.

It is a super-3 number, since 3×18265225844117³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18265225844417) 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, 6730583 + ... + 9046059.

It is an arithmetic number, because the mean of its divisors is an integer number (1307698617192).

Almost surely, 2^{18265225844117} is an apocalyptic number.

It is an amenable number.

18265225844117 is a deficient number, since it is larger than the sum of its proper divisors (2657952030955).

18265225844117 is a wasteful number, since it uses less digits than its factorization.

18265225844117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318108.

The product of its digits is 8601600, while the sum is 56.

The spelling of 18265225844117 in words is "eighteen trillion, two hundred sixty-five billion, two hundred twenty-five million, eight hundred forty-four thousand, one hundred seventeen".