18323480820 has 48 divisors (see below), whose sum is σ = 51406629120. Its totient is φ = 4876653696.

The previous prime is 18323480797. The next prime is 18323480839. The reversal of 18323480820 is 2808432381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269452 + ... + 330531.

It is an arithmetic number, because the mean of its divisors is an integer number (1070971440).

Almost surely, 2^18323480820 is an apocalyptic number.

18323480820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18323480820 is an abundant number, since it is smaller than the sum of its proper divisors (33083148300).

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

18323480820 is a wasteful number, since it uses less digits than its factorization.

18323480820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600504 (or 600502 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The spelling of 18323480820 in words is "eighteen billion, three hundred twenty-three million, four hundred eighty thousand, eight hundred twenty".