185020505000 has 40 divisors (see below), whose sum is σ = 433503054930. Its totient is φ = 74008200000.

The previous prime is 185020504987. The next prime is 185020505027. The reversal of 185020505000 is 505020581.

It can be written as a sum of positive squares in 5 ways, for example, as 32993816164 + 152026688836 = 181642^2 + 389906^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 18497051 + ... + 18507050.

Almost surely, 2^185020505000 is an apocalyptic number.

185020505000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

185020505000 is an abundant number, since it is smaller than the sum of its proper divisors (248482549930).

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

185020505000 is an equidigital number, since it uses as much as digits as its factorization.

185020505000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37004127 (or 37004108 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 185020505000 its reverse (505020581), we get a palindrome (185525525581).

The spelling of 185020505000 in words is "one hundred eighty-five billion, twenty million, five hundred five thousand".