185474945820 has 24 divisors (see below), whose sum is σ = 519329848464. Its totient is φ = 49459985536.

The previous prime is 185474945779. The next prime is 185474945833. The reversal of 185474945820 is 28549474581.

185474945820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1545624489 + ... + 1545624608.

It is an arithmetic number, because the mean of its divisors is an integer number (21638743686).

Almost surely, 2^185474945820 is an apocalyptic number.

185474945820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

185474945820 is an abundant number, since it is smaller than the sum of its proper divisors (333854902644).

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

185474945820 is a wasteful number, since it uses less digits than its factorization.

185474945820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3091249109 (or 3091249107 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 57.

The spelling of 185474945820 in words is "one hundred eighty-five billion, four hundred seventy-four million, nine hundred forty-five thousand, eight hundred twenty".