20201012440 has 128 divisors (see below), whose sum is σ = 53111376000. Its totient is φ = 6912245760.

The previous prime is 20201012413. The next prime is 20201012449. The reversal of 20201012440 is 4421010202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201012449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8793372 + ... + 8795668.

It is an arithmetic number, because the mean of its divisors is an integer number (414932625).

Almost surely, 2^20201012440 is an apocalyptic number.

20201012440 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 20201012440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26555688000).

20201012440 is an abundant number, since it is smaller than the sum of its proper divisors (32910363560).

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

20201012440 is a wasteful number, since it uses less digits than its factorization.

20201012440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2970 (or 2952 counting only the distinct ones).

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

Adding to 20201012440 its reverse (4421010202), we get a palindrome (24622022642).

The spelling of 20201012440 in words is "twenty billion, two hundred one million, twelve thousand, four hundred forty".