20442044240440 has 64 divisors (see below), whose sum is σ = 46503883308960. Its totient is φ = 8086704437760.

The previous prime is 20442044240407. The next prime is 20442044240447. The reversal of 20442044240440 is 4404244024402.

It is a junction number, because it is equal to n+sod(n) for n = 20442044240396 and 20442044240405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442044240447) 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, 5121939 + ... + 8192578.

Almost surely, 2^{20442044240440} is an apocalyptic number.

20442044240440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20442044240440 is an abundant number, since it is smaller than the sum of its proper divisors (26061839068520).

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

20442044240440 is a wasteful number, since it uses less digits than its factorization.

20442044240440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13314952 (or 13314948 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 34.

Adding to 20442044240440 its reverse (4404244024402), we get a palindrome (24846288264842).

The spelling of 20442044240440 in words is "twenty trillion, four hundred forty-two billion, forty-four million, two hundred forty thousand, four hundred forty".