20113044440 has 64 divisors (see below), whose sum is σ = 46200123360. Its totient is φ = 7878251520.

The previous prime is 20113044409. The next prime is 20113044451. The reversal of 20113044440 is 4444031102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 535724 + ... + 572036.

Almost surely, 2^20113044440 is an apocalyptic number.

20113044440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20113044440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23100061680).

20113044440 is an abundant number, since it is smaller than the sum of its proper divisors (26087078920).

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

20113044440 is a wasteful number, since it uses less digits than its factorization.

20113044440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36612 (or 36608 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 20113044440 its reverse (4444031102), we get a palindrome (24557075542).

The spelling of 20113044440 in words is "twenty billion, one hundred thirteen million, forty-four thousand, four hundred forty".