20344340140 has 48 divisors (see below), whose sum is σ = 43176605472. Its totient is φ = 8051549696.

The previous prime is 20344340119. The next prime is 20344340141. The reversal of 20344340140 is 4104344302.

It is not an unprimeable number, because it can be changed into a prime (20344340141) 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, 1828434 + ... + 1839526.

It is an arithmetic number, because the mean of its divisors is an integer number (899512614).

Almost surely, 2^20344340140 is an apocalyptic number.

20344340140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20344340140 is an abundant number, since it is smaller than the sum of its proper divisors (22832265332).

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

20344340140 is a wasteful number, since it uses less digits than its factorization.

20344340140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12066 (or 12064 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20344340140 its reverse (4104344302), we get a palindrome (24448684442).

The spelling of 20344340140 in words is "twenty billion, three hundred forty-four million, three hundred forty thousand, one hundred forty".