2012423140 has 144 divisors (see below), whose sum is σ = 5337490032. Its totient is φ = 631701504.

The previous prime is 2012423107. The next prime is 2012423141. The reversal of 2012423140 is 413242102.

It can be written as a sum of positive squares in 8 ways, for example, as 9144576 + 2003278564 = 3024^2 + 44758^2 .

It is not an unprimeable number, because it can be changed into a prime (2012423141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1744804 + ... + 1745956.

It is an arithmetic number, because the mean of its divisors is an integer number (37065903).

Almost surely, 2^2012423140 is an apocalyptic number.

2012423140 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 2012423140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2668745016).

2012423140 is an abundant number, since it is smaller than the sum of its proper divisors (3325066892).

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

2012423140 is a wasteful number, since it uses less digits than its factorization.

2012423140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326 (or 1317 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2012423140 is about 44860.0394560682. The cubic root of 2012423140 is about 1262.5243630236.

Adding to 2012423140 its reverse (413242102), we get a palindrome (2425665242).

It can be divided in two parts, 20124 and 23140, that added together give a square (43264 = 208²).

The spelling of 2012423140 in words is "two billion, twelve million, four hundred twenty-three thousand, one hundred forty".