20144331340440 has 64 divisors (see below), whose sum is σ = 60437709295200. Its totient is φ = 5371402555392.

The previous prime is 20144331340439. The next prime is 20144331340447. The reversal of 20144331340440 is 4404313344102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20144331340447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5003097 + ... + 8082056.

Almost surely, 2^{20144331340440} is an apocalyptic number.

20144331340440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20144331340440 is an abundant number, since it is smaller than the sum of its proper divisors (40293377954760).

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

20144331340440 is a wasteful number, since it uses less digits than its factorization.

20144331340440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13097996 (or 13097992 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 20144331340440 its reverse (4404313344102), we get a palindrome (24548644684542).

The spelling of 20144331340440 in words is "twenty trillion, one hundred forty-four billion, three hundred thirty-one million, three hundred forty thousand, four hundred forty".