2000204661 has 64 divisors (see below), whose sum is σ = 3416784896. Its totient is φ = 1012435200.

The previous prime is 2000204629. The next prime is 2000204671. The reversal of 2000204661 is 1664020002.

It is a happy number.

It is not a de Polignac number, because 2000204661 - 2⁵ = 2000204629 is a prime.

It is a super-2 number, since 2×2000204661² = 8001637371772249842, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000204621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1073871 + ... + 1075731.

It is an arithmetic number, because the mean of its divisors is an integer number (53387264).

Almost surely, 2^2000204661 is an apocalyptic number.

2000204661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2000204661 is a deficient number, since it is larger than the sum of its proper divisors (1416580235).

2000204661 is a wasteful number, since it uses less digits than its factorization.

2000204661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 2000204661 is about 44723.6476710029. The cubic root of 2000204661 is about 1259.9640245460.

Adding to 2000204661 its reverse (1664020002), we get a palindrome (3664224663).

The spelling of 2000204661 in words is "two billion, two hundred four thousand, six hundred sixty-one".