19895850 has 144 divisors (see below), whose sum is σ = 60933600. Its totient is φ = 4613760.

The previous prime is 19895849. The next prime is 19895867. The reversal of 19895850 is 5859891.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19895796 and 19895805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 111061 + ... + 111239.

It is an arithmetic number, because the mean of its divisors is an integer number (423150).

Almost surely, 2^19895850 is an apocalyptic number.

19895850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19895850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30466800).

19895850 is an abundant number, since it is smaller than the sum of its proper divisors (41037750).

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

19895850 is a wasteful number, since it uses less digits than its factorization.

19895850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The square root of 19895850 is about 4460.4764319521. The cubic root of 19895850 is about 270.9697637412.

The spelling of 19895850 in words is "nineteen million, eight hundred ninety-five thousand, eight hundred fifty".