19389136 has 60 divisors (see below), whose sum is σ = 42234276. Its totient is φ = 8570880.

The previous prime is 19389133. The next prime is 19389151. The reversal of 19389136 is 63198391.

It can be written as a sum of positive squares in 2 ways, for example, as 5550736 + 13838400 = 2356^2 + 3720^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19389131) 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 11 ways as a sum of consecutive naturals, for example, 199840 + ... + 199936.

Almost surely, 2^19389136 is an apocalyptic number.

19389136 is a gapful number since it is divisible by the number (16) 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 19389136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21117138).

19389136 is an abundant number, since it is smaller than the sum of its proper divisors (22845140).

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

19389136 is a wasteful number, since it uses less digits than its factorization.

19389136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 143 counting only the distinct ones).

The product of its digits is 34992, while the sum is 40.

The square root of 19389136 is about 4403.3096643320. The cubic root of 19389136 is about 268.6495715618.

The spelling of 19389136 in words is "nineteen million, three hundred eighty-nine thousand, one hundred thirty-six".