18350350020 has 72 divisors (see below), whose sum is σ = 55674394776. Its totient is φ = 4892401152.

The previous prime is 18350350009. The next prime is 18350350049. The reversal of 18350350020 is 2005305381.

It can be written as a sum of positive squares in 4 ways, for example, as 1224440064 + 17125909956 = 34992^2 + 130866^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1287654 + ... + 1301826.

It is an arithmetic number, because the mean of its divisors is an integer number (773255483).

Almost surely, 2^18350350020 is an apocalyptic number.

18350350020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18350350020 is an abundant number, since it is smaller than the sum of its proper divisors (37324044756).

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

18350350020 is a wasteful number, since it uses less digits than its factorization.

18350350020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21381 (or 21376 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 18350350020 in words is "eighteen billion, three hundred fifty million, three hundred fifty thousand, twenty".