2001443620 has 48 divisors (see below), whose sum is σ = 4588291008. Its totient is φ = 727295360.

The previous prime is 2001443581. The next prime is 2001443623. The reversal of 2001443620 is 263441002.

It is a happy number.

It is a super-3 number, since 3×2001443620³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 2001443591 and 2001443600.

It is not an unprimeable number, because it can be changed into a prime (2001443623) 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 15 ways as a sum of consecutive naturals, for example, 496734 + ... + 500746.

It is an arithmetic number, because the mean of its divisors is an integer number (95589396).

Almost surely, 2^2001443620 is an apocalyptic number.

2001443620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001443620 is an abundant number, since it is smaller than the sum of its proper divisors (2586847388).

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

2001443620 is a wasteful number, since it uses less digits than its factorization.

2001443620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6300 (or 6298 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 2001443620 is about 44737.4968007822. The cubic root of 2001443620 is about 1260.2241181917.

Adding to 2001443620 its reverse (263441002), we get a palindrome (2264884622).

The spelling of 2001443620 in words is "two billion, one million, four hundred forty-three thousand, six hundred twenty".