19885550 has 24 divisors (see below), whose sum is σ = 37269936. Its totient is φ = 7893440.

The previous prime is 19885543. The next prime is 19885661. The reversal of 19885550 is 5558891.

It is a super-3 number, since 3×19885550³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19885498 and 19885507.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 5399 + ... + 8301.

It is an arithmetic number, because the mean of its divisors is an integer number (1552914).

Almost surely, 2^19885550 is an apocalyptic number.

19885550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19885550 is a deficient number, since it is larger than the sum of its proper divisors (17384386).

19885550 is a wasteful number, since it uses less digits than its factorization.

19885550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3052 (or 3047 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 41.

The square root of 19885550 is about 4459.3216972988. The cubic root of 19885550 is about 270.9229956911.

The spelling of 19885550 in words is "nineteen million, eight hundred eighty-five thousand, five hundred fifty".