18265616028 has 72 divisors (see below), whose sum is σ = 53019832320. Its totient is φ = 5243715360.

The previous prime is 18265616027. The next prime is 18265616053. The reversal of 18265616028 is 82061656281.

18265616028 is a `hidden beast` number, since 1 + 8 + 2 + 6 + 5 + 616 + 0 + 28 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18265616021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1206300 + ... + 1221347.

It is an arithmetic number, because the mean of its divisors is an integer number (736386560).

Almost surely, 2^18265616028 is an apocalyptic number.

18265616028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18265616028 is an abundant number, since it is smaller than the sum of its proper divisors (34754216292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18265616028 is a wasteful number, since it uses less digits than its factorization.

18265616028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427687 (or 2427682 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 18265616028 in words is "eighteen billion, two hundred sixty-five million, six hundred sixteen thousand, twenty-eight".