2001143420 has 24 divisors (see below), whose sum is σ = 4203290448. Its totient is φ = 800288000.

The previous prime is 2001143411. The next prime is 2001143437. The reversal of 2001143420 is 243411002.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 135395 + ... + 149445.

It is an arithmetic number, because the mean of its divisors is an integer number (175137102).

Almost surely, 2^2001143420 is an apocalyptic number.

2001143420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001143420 is an abundant number, since it is smaller than the sum of its proper divisors (2202147028).

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

2001143420 is a wasteful number, since it uses less digits than its factorization.

2001143420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21181 (or 21179 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2001143420 is about 44734.1415475920. The cubic root of 2001143420 is about 1260.1611073074.

Adding to 2001143420 its reverse (243411002), we get a palindrome (2244554422).

The spelling of 2001143420 in words is "two billion, one million, one hundred forty-three thousand, four hundred twenty".