2001620268 has 24 divisors (see below), whose sum is σ = 5189386160. Its totient is φ = 667206720.

The previous prime is 2001620263. The next prime is 2001620297. The reversal of 2001620268 is 8620261002.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2001620261) 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 7 ways as a sum of consecutive naturals, for example, 9266653 + ... + 9266868.

Almost surely, 2^2001620268 is an apocalyptic number.

It is an amenable number.

2001620268 is an abundant number, since it is smaller than the sum of its proper divisors (3187765892).

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

2001620268 is a wasteful number, since it uses less digits than its factorization.

2001620268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18533534 (or 18533526 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 2001620268 is about 44739.4710295059. The cubic root of 2001620268 is about 1260.2611930175.

The spelling of 2001620268 in words is "two billion, one million, six hundred twenty thousand, two hundred sixty-eight".