20033442 has 96 divisors (see below), whose sum is σ = 52468416. Its totient is φ = 5443200.

The previous prime is 20033441. The next prime is 20033459. The reversal of 20033442 is 24433002.

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

It is not an unprimeable number, because it can be changed into a prime (20033441) 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 47 ways as a sum of consecutive naturals, for example, 110592 + ... + 110772.

It is an arithmetic number, because the mean of its divisors is an integer number (546546).

Almost surely, 2^20033442 is an apocalyptic number.

20033442 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 20033442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26234208).

20033442 is an abundant number, since it is smaller than the sum of its proper divisors (32434974).

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

20033442 is a wasteful number, since it uses less digits than its factorization.

20033442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 253 counting only the distinct ones).

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

The square root of 20033442 is about 4475.8733226042. The cubic root of 20033442 is about 271.5929700022.

Adding to 20033442 its reverse (24433002), we get a palindrome (44466444).

It can be divided in two parts, 2003 and 3442, that added together give a palindrome (5445).

The spelling of 20033442 in words is "twenty million, thirty-three thousand, four hundred forty-two".