18555350020 has 12 divisors (see below), whose sum is σ = 38966235084. Its totient is φ = 7422140000.

The previous prime is 18555350017. The next prime is 18555350029. The reversal of 18555350020 is 2005355581.

It can be written as a sum of positive squares in 2 ways, for example, as 14492307456 + 4063042564 = 120384^2 + 63742^2 .

It is not an unprimeable number, because it can be changed into a prime (18555350029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463883731 + ... + 463883770.

It is an arithmetic number, because the mean of its divisors is an integer number (3247186257).

Almost surely, 2^18555350020 is an apocalyptic number.

18555350020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18555350020 is an abundant number, since it is smaller than the sum of its proper divisors (20410885064).

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

18555350020 is a wasteful number, since it uses less digits than its factorization.

18555350020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927767510 (or 927767508 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 34.

The spelling of 18555350020 in words is "eighteen billion, five hundred fifty-five million, three hundred fifty thousand, twenty".