185921922050 has 90 divisors (see below), whose sum is σ = 369177557229. Its totient is φ = 69662409600.

The previous prime is 185921922041. The next prime is 185921922077. The reversal of 185921922050 is 50229129581.

It can be written as a sum of positive squares in 8 ways, for example, as 35027742649 + 150894179401 = 187157^2 + 388451^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=304895.

It is a super-2 number, since 2×185921922050² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 185921921992 and 185921922010.

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 44 ways as a sum of consecutive naturals, for example, 881146445 + ... + 881146655.

Almost surely, 2^185921922050 is an apocalyptic number.

185921922050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

185921922050 is a deficient number, since it is larger than the sum of its proper divisors (183255635179).

185921922050 is an frugal number, since it uses more digits than its factorization.

185921922050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 44.

The spelling of 185921922050 in words is "one hundred eighty-five billion, nine hundred twenty-one million, nine hundred twenty-two thousand, fifty".