18265051844 has 24 divisors (see below), whose sum is σ = 34427870400. Its totient is φ = 8428732704.

The previous prime is 18265051843. The next prime is 18265051853. The reversal of 18265051844 is 44815056281.

It is a super-2 number, since 2×18265051844² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18265051795 and 18265051804.

It is not an unprimeable number, because it can be changed into a prime (18265051841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372257 + ... + 418455.

It is an arithmetic number, because the mean of its divisors is an integer number (1434494600).

Almost surely, 2^18265051844 is an apocalyptic number.

It is an amenable number.

18265051844 is a deficient number, since it is larger than the sum of its proper divisors (16162818556).

18265051844 is a wasteful number, since it uses less digits than its factorization.

18265051844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53819 (or 53817 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 44.

The spelling of 18265051844 in words is "eighteen billion, two hundred sixty-five million, fifty-one thousand, eight hundred forty-four".