20002444 has 48 divisors (see below), whose sum is σ = 44142336. Its totient is φ = 7704000.

The previous prime is 20002429. The next prime is 20002453. The reversal of 20002444 is 44420002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30787 + ... + 31429.

It is an arithmetic number, because the mean of its divisors is an integer number (919632).

Almost surely, 2^20002444 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 20002444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22071168).

20002444 is an abundant number, since it is smaller than the sum of its proper divisors (24139892).

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

20002444 is a wasteful number, since it uses less digits than its factorization.

20002444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 20002444 is about 4472.4091941592. The cubic root of 20002444 is about 271.4528179369.

Adding to 20002444 its reverse (44420002), we get a palindrome (64422446).

It can be divided in two parts, 20002 and 444, that multiplied together give a palindrome (8880888).

The spelling of 20002444 in words is "twenty million, two thousand, four hundred forty-four".