18230055820 has 24 divisors (see below), whose sum is σ = 38290836528. Its totient is φ = 7290552000.

The previous prime is 18230055817. The next prime is 18230055821. The reversal of 18230055820 is 2855003281.

It is not an unprimeable number, because it can be changed into a prime (18230055821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12675 + ... + 191365.

It is an arithmetic number, because the mean of its divisors is an integer number (1595451522).

Almost surely, 2^18230055820 is an apocalyptic number.

18230055820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18230055820 is an abundant number, since it is smaller than the sum of its proper divisors (20060780708).

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

18230055820 is a wasteful number, since it uses less digits than its factorization.

18230055820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183801 (or 183799 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The spelling of 18230055820 in words is "eighteen billion, two hundred thirty million, fifty-five thousand, eight hundred twenty".