18265238428 has 12 divisors (see below), whose sum is σ = 31965151680. Its totient is φ = 9132337952.

The previous prime is 18265238399. The next prime is 18265238491. The reversal of 18265238428 is 82483256281.

It is a happy number.

It is a super-3 number, since 3×18265238428³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158613 + ... + 248371.

It is an arithmetic number, because the mean of its divisors is an integer number (2663762640).

Almost surely, 2^18265238428 is an apocalyptic number.

It is an amenable number.

18265238428 is a deficient number, since it is larger than the sum of its proper divisors (13699913252).

18265238428 is a wasteful number, since it uses less digits than its factorization.

18265238428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140636 (or 140634 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 49.

The spelling of 18265238428 in words is "eighteen billion, two hundred sixty-five million, two hundred thirty-eight thousand, four hundred twenty-eight".