20043342 has 64 divisors (see below), whose sum is σ = 49835520. Its totient is φ = 5918400.

The previous prime is 20043341. The next prime is 20043343. The reversal of 20043342 is 24334002.

It is an interprime number because it is at equal distance from previous prime (20043341) and next prime (20043343).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043341) 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 31 ways as a sum of consecutive naturals, for example, 23943 + ... + 24765.

It is an arithmetic number, because the mean of its divisors is an integer number (778680).

Almost surely, 2^20043342 is an apocalyptic number.

20043342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20043342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24917760).

20043342 is an abundant number, since it is smaller than the sum of its proper divisors (29792178).

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

20043342 is a wasteful number, since it uses less digits than its factorization.

20043342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 20043342 is about 4476.9791154304. The cubic root of 20043342 is about 271.6377006683.

Adding to 20043342 its reverse (24334002), we get a palindrome (44377344).

The spelling of 20043342 in words is "twenty million, forty-three thousand, three hundred forty-two".