2021440134 has 64 divisors (see below), whose sum is σ = 4881346560. Its totient is φ = 545162400.

The previous prime is 2021440121. The next prime is 2021440139. The reversal of 2021440134 is 4310441202.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 2021440134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021440139) 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, 221359 + ... + 230309.

It is an arithmetic number, because the mean of its divisors is an integer number (76271040).

Almost surely, 2^2021440134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021440134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2440673280).

2021440134 is an abundant number, since it is smaller than the sum of its proper divisors (2859906426).

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

2021440134 is a wasteful number, since it uses less digits than its factorization.

2021440134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9265.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2021440134 is about 44960.4285344346. The cubic root of 2021440134 is about 1264.4072032819.

Adding to 2021440134 its reverse (4310441202), we get a palindrome (6331881336).

The spelling of 2021440134 in words is "two billion, twenty-one million, four hundred forty thousand, one hundred thirty-four".