2005421140 has 12 divisors (see below), whose sum is σ = 4211384436. Its totient is φ = 802168448.

The previous prime is 2005421027. The next prime is 2005421149. The reversal of 2005421140 is 411245002.

It can be written as a sum of positive squares in 2 ways, for example, as 822886596 + 1182534544 = 28686^2 + 34388^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005421149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50135509 + ... + 50135548.

It is an arithmetic number, because the mean of its divisors is an integer number (350948703).

Almost surely, 2^2005421140 is an apocalyptic number.

2005421140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2005421140 is an abundant number, since it is smaller than the sum of its proper divisors (2205963296).

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

2005421140 is a wasteful number, since it uses less digits than its factorization.

2005421140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100271066 (or 100271064 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 2005421140 is about 44781.9287213045. The cubic root of 2005421140 is about 1261.0583909656.

Adding to 2005421140 its reverse (411245002), we get a palindrome (2416666142).

The spelling of 2005421140 in words is "two billion, five million, four hundred twenty-one thousand, one hundred forty".