20420003044 has 72 divisors (see below), whose sum is σ = 43120728000. Its totient is φ = 8426472768.

The previous prime is 20420002997. The next prime is 20420003047. The reversal of 20420003044 is 44030002402.

It is not an unprimeable number, because it can be changed into a prime (20420003047) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2149497 + ... + 2158975.

It is an arithmetic number, because the mean of its divisors is an integer number (598899000).

Almost surely, 2^20420003044 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 20420003044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21560364000).

20420003044 is an abundant number, since it is smaller than the sum of its proper divisors (22700724956).

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

20420003044 is a wasteful number, since it uses less digits than its factorization.

20420003044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9905 (or 9896 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

Adding to 20420003044 its reverse (44030002402), we get a palindrome (64450005446).

The spelling of 20420003044 in words is "twenty billion, four hundred twenty million, three thousand, forty-four".