19892144 has 40 divisors (see below), whose sum is σ = 40838160. Its totient is φ = 9370368.

The previous prime is 19892113. The next prime is 19892149. The reversal of 19892144 is 44129891.

It is a junction number, because it is equal to n+sod(n) for n = 19892098 and 19892107.

It is not an unprimeable number, because it can be changed into a prime (19892149) 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 7 ways as a sum of consecutive naturals, for example, 19454 + ... + 20450.

It is an arithmetic number, because the mean of its divisors is an integer number (1020954).

Almost surely, 2^19892144 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 19892144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20419080).

19892144 is an abundant number, since it is smaller than the sum of its proper divisors (20946016).

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

19892144 is a wasteful number, since it uses less digits than its factorization.

19892144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077 (or 1071 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 19892144 is about 4460.0609861301. The cubic root of 19892144 is about 270.9529381838.

The spelling of 19892144 in words is "nineteen million, eight hundred ninety-two thousand, one hundred forty-four".