20144442340 has 48 divisors (see below), whose sum is σ = 46799109504. Its totient is φ = 7222073600.

The previous prime is 20144442293. The next prime is 20144442343. The reversal of 20144442340 is 4324444102.

It is a junction number, because it is equal to n+sod(n) for n = 20144442299 and 20144442308.

It is not an unprimeable number, because it can be changed into a prime (20144442343) 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, 629209 + ... + 660448.

It is an arithmetic number, because the mean of its divisors is an integer number (974981448).

Almost surely, 2^20144442340 is an apocalyptic number.

20144442340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20144442340 is an abundant number, since it is smaller than the sum of its proper divisors (26654667164).

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

20144442340 is a wasteful number, since it uses less digits than its factorization.

20144442340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289748 (or 1289746 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 20144442340 its reverse (4324444102), we get a palindrome (24468886442).

The spelling of 20144442340 in words is "twenty billion, one hundred forty-four million, four hundred forty-two thousand, three hundred forty".