18308366928 has 40 divisors (see below), whose sum is σ = 52551795200. Its totient is φ = 6102788832.

The previous prime is 18308366893. The next prime is 18308366929. The reversal of 18308366928 is 82966380381.

It is a happy number.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18308366929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21189808 + ... + 21190671.

It is an arithmetic number, because the mean of its divisors is an integer number (1313794880).

Almost surely, 2^18308366928 is an apocalyptic number.

18308366928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18308366928 is an abundant number, since it is smaller than the sum of its proper divisors (34243428272).

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

18308366928 is a wasteful number, since it uses less digits than its factorization.

18308366928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42380496 (or 42380484 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 18308366928 in words is "eighteen billion, three hundred eight million, three hundred sixty-six thousand, nine hundred twenty-eight".