19185012 has 120 divisors (see below), whose sum is σ = 62610240. Its totient is φ = 4976640.

The previous prime is 19185011. The next prime is 19185031. The reversal of 19185012 is 21058191.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19185011) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 24564 + ... + 25332.

It is an arithmetic number, because the mean of its divisors is an integer number (521752).

Almost surely, 2^19185012 is an apocalyptic number.

19185012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19185012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31305120).

19185012 is an abundant number, since it is smaller than the sum of its proper divisors (43425228).

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

19185012 is a wasteful number, since it uses less digits than its factorization.

19185012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803 (or 792 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 19185012 is about 4380.0698624565. The cubic root of 19185012 is about 267.7034850816.

The spelling of 19185012 in words is "nineteen million, one hundred eighty-five thousand, twelve".