20144423310440 has 64 divisors (see below), whose sum is σ = 53248895199360. Its totient is φ = 6761764465920.

The previous prime is 20144423310383. The next prime is 20144423310449. The reversal of 20144423310440 is 4401332444102.

It is a super-2 number, since 2×20144423310440² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20144423310397 and 20144423310406.

It is not an unprimeable number, because it can be changed into a prime (20144423310449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1760870444 + ... + 1760881883.

It is an arithmetic number, because the mean of its divisors is an integer number (832013987490).

Almost surely, 2^{20144423310440} is an apocalyptic number.

20144423310440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20144423310440 is an abundant number, since it is smaller than the sum of its proper divisors (33104471888920).

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

20144423310440 is a wasteful number, since it uses less digits than its factorization.

20144423310440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3521752362 (or 3521752358 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 20144423310440 its reverse (4401332444102), we get a palindrome (24545755754542).

The spelling of 20144423310440 in words is "twenty trillion, one hundred forty-four billion, four hundred twenty-three million, three hundred ten thousand, four hundred forty".