20001440140 has 96 divisors (see below), whose sum is σ = 46709913600. Its totient is φ = 7132830720.

The previous prime is 20001440111. The next prime is 20001440143. The reversal of 20001440140 is 4104410002.

It is not an unprimeable number, because it can be changed into a prime (20001440143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6215812 + ... + 6219028.

It is an arithmetic number, because the mean of its divisors is an integer number (486561600).

Almost surely, 2^20001440140 is an apocalyptic number.

20001440140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20001440140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23354956800).

20001440140 is an abundant number, since it is smaller than the sum of its proper divisors (26708473460).

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

20001440140 is a wasteful number, since it uses less digits than its factorization.

20001440140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3775 (or 3773 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20001440140 its reverse (4104410002), we get a palindrome (24105850142).

The spelling of 20001440140 in words is "twenty billion, one million, four hundred forty thousand, one hundred forty".