19749212 has 48 divisors (see below), whose sum is σ = 41395200. Its totient is φ = 8068032.

The previous prime is 19749199. The next prime is 19749229. The reversal of 19749212 is 21294791.

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 15 ways as a sum of consecutive naturals, for example, 56414 + ... + 56762.

It is an arithmetic number, because the mean of its divisors is an integer number (862400).

Almost surely, 2^19749212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19749212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20697600).

19749212 is an abundant number, since it is smaller than the sum of its proper divisors (21645988).

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

19749212 is a wasteful number, since it uses less digits than its factorization.

19749212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450 (or 448 counting only the distinct ones).

The product of its digits is 9072, while the sum is 35.

The square root of 19749212 is about 4444.0085508469. The cubic root of 19749212 is about 270.3024137838.

The spelling of 19749212 in words is "nineteen million, seven hundred forty-nine thousand, two hundred twelve".