20189344 has 48 divisors (see below), whose sum is σ = 45759168. Its totient is φ = 8589312.

The previous prime is 20189341. The next prime is 20189357. The reversal of 20189344 is 44398102.

It is a super-2 number, since 2×20189344² = 815219222300672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20189341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42999 + ... + 43465.

It is an arithmetic number, because the mean of its divisors is an integer number (953316).

Almost surely, 2^20189344 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 20189344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22879584).

20189344 is an abundant number, since it is smaller than the sum of its proper divisors (25569824).

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

20189344 is a wasteful number, since it uses less digits than its factorization.

20189344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 20189344 is about 4493.2553900263. The cubic root of 20189344 is about 272.2956704090.

The spelling of 20189344 in words is "twenty million, one hundred eighty-nine thousand, three hundred forty-four".