204402666620 has 24 divisors (see below), whose sum is σ = 429254293104. Its totient is φ = 81759410816.

The previous prime is 204402666619. The next prime is 204402666631. The reversal of 204402666620 is 26666204402.

It is a happy number.

204402666620 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1564247 + ... + 1689873.

It is an arithmetic number, because the mean of its divisors is an integer number (17885595546).

Almost surely, 2^204402666620 is an apocalyptic number.

204402666620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204402666620 is an abundant number, since it is smaller than the sum of its proper divisors (224851626484).

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

204402666620 is a wasteful number, since it uses less digits than its factorization.

204402666620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206989 (or 206987 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 204402666620 in words is "two hundred four billion, four hundred two million, six hundred sixty-six thousand, six hundred twenty".