40444020020 has 96 divisors (see below), whose sum is σ = 89213806080. Its totient is φ = 15380951040.

The previous prime is 40444020013. The next prime is 40444020037. The reversal of 40444020020 is 2002044404.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 40444019974 and 40444020001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11869157 + ... + 11872563.

It is an arithmetic number, because the mean of its divisors is an integer number (929310480).

Almost surely, 2^40444020020 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 40444020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44606903040).

40444020020 is an abundant number, since it is smaller than the sum of its proper divisors (48769786060).

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

40444020020 is a wasteful number, since it uses less digits than its factorization.

40444020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3753 (or 3751 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 40444020020 its reverse (2002044404), we get a palindrome (42446064424).

The spelling of 40444020020 in words is "forty billion, four hundred forty-four million, twenty thousand, twenty".