20440165724 has 96 divisors (see below), whose sum is σ = 41928983040. Its totient is φ = 8620473600.

The previous prime is 20440165723. The next prime is 20440165751. The reversal of 20440165724 is 42756104402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440165723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14125169 + ... + 14126615.

It is an arithmetic number, because the mean of its divisors is an integer number (436760240).

Almost surely, 2^20440165724 is an apocalyptic number.

It is an amenable number.

20440165724 is an abundant number, since it is smaller than the sum of its proper divisors (21488817316).

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

20440165724 is a wasteful number, since it uses less digits than its factorization.

20440165724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819 (or 1817 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 35.

The spelling of 20440165724 in words is "twenty billion, four hundred forty million, one hundred sixty-five thousand, seven hundred twenty-four".