2006243644 has 24 divisors (see below), whose sum is σ = 3720826368. Its totient is φ = 943257600.

The previous prime is 2006243641. The next prime is 2006243683. The reversal of 2006243644 is 4463426002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2006243641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65452 + ... + 91084.

It is an arithmetic number, because the mean of its divisors is an integer number (155034432).

Almost surely, 2^2006243644 is an apocalyptic number.

It is an amenable number.

2006243644 is a deficient number, since it is larger than the sum of its proper divisors (1714582724).

2006243644 is a wasteful number, since it uses less digits than its factorization.

2006243644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26805 (or 26803 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

The square root of 2006243644 is about 44791.1112164010. Note that the first 3 decimals coincide. The cubic root of 2006243644 is about 1261.2307710174.

Adding to 2006243644 its reverse (4463426002), we get a palindrome (6469669646).

The spelling of 2006243644 in words is "two billion, six million, two hundred forty-three thousand, six hundred forty-four".