20144531715720 has 128 divisors (see below), whose sum is σ = 62555123404800. Its totient is φ = 5183517717504.

The previous prime is 20144531715683. The next prime is 20144531715733. The reversal of 20144531715720 is 2751713544102.

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, 4046814 + ... + 7527666.

It is an arithmetic number, because the mean of its divisors is an integer number (488711901600).

Almost surely, 2^{20144531715720} is an apocalyptic number.

20144531715720 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 20144531715720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31277561702400).

20144531715720 is an abundant number, since it is smaller than the sum of its proper divisors (42410591689080).

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

20144531715720 is a wasteful number, since it uses less digits than its factorization.

20144531715720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3482559 (or 3482555 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 42.

The spelling of 20144531715720 in words is "twenty trillion, one hundred forty-four billion, five hundred thirty-one million, seven hundred fifteen thousand, seven hundred twenty".