20442244240 has 40 divisors (see below), whose sum is σ = 51848967168. Its totient is φ = 7433543040.

The previous prime is 20442244211. The next prime is 20442244253. The reversal of 20442244240 is 4244224402.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 20442244199 and 20442244208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11614032 + ... + 11615791.

Almost surely, 2^20442244240 is an apocalyptic number.

20442244240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20442244240 is an abundant number, since it is smaller than the sum of its proper divisors (31406722928).

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

20442244240 is a wasteful number, since it uses less digits than its factorization.

20442244240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23229847 (or 23229841 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 20442244240 its reverse (4244224402), we get a palindrome (24686468642).

The spelling of 20442244240 in words is "twenty billion, four hundred forty-two million, two hundred forty-four thousand, two hundred forty".