2001022340 has 12 divisors (see below), whose sum is σ = 4202146956. Its totient is φ = 800408928.

The previous prime is 2001022313. The next prime is 2001022357. The reversal of 2001022340 is 432201002.

It can be written as a sum of positive squares in 2 ways, for example, as 564157504 + 1436864836 = 23752^2 + 37906^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50025539 + ... + 50025578.

It is an arithmetic number, because the mean of its divisors is an integer number (350178913).

Almost surely, 2^2001022340 is an apocalyptic number.

2001022340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001022340 is an abundant number, since it is smaller than the sum of its proper divisors (2201124616).

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

2001022340 is a wasteful number, since it uses less digits than its factorization.

2001022340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100051126 (or 100051124 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 2001022340 is about 44732.7881983674. The cubic root of 2001022340 is about 1260.1356912740.

Adding to 2001022340 its reverse (432201002), we get a palindrome (2433223342).

The spelling of 2001022340 in words is "two billion, one million, twenty-two thousand, three hundred forty".