20032120044 has 72 divisors (see below), whose sum is σ = 52625821248. Its totient is φ = 6662923920.

The previous prime is 20032120027. The next prime is 20032120049. The reversal of 20032120044 is 44002123002.

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

It is a junction number, because it is equal to n+sod(n) for n = 20032119999 and 20032120026.

It is not an unprimeable number, because it can be changed into a prime (20032120049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 431859 + ... + 475989.

It is an arithmetic number, because the mean of its divisors is an integer number (730914184).

Almost surely, 2^20032120044 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 20032120044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26312910624).

20032120044 is an abundant number, since it is smaller than the sum of its proper divisors (32593701204).

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

20032120044 is a wasteful number, since it uses less digits than its factorization.

20032120044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44617 (or 44603 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20032120044 its reverse (44002123002), we get a palindrome (64034243046).

The spelling of 20032120044 in words is "twenty billion, thirty-two million, one hundred twenty thousand, forty-four".