204664022420 has 48 divisors (see below), whose sum is σ = 504933343488. Its totient is φ = 68698412160.

The previous prime is 204664022417. The next prime is 204664022467. The reversal of 204664022420 is 24220466402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35777564 + ... + 35783283.

It is an arithmetic number, because the mean of its divisors is an integer number (10519444656).

Almost surely, 2^204664022420 is an apocalyptic number.

204664022420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204664022420 is an abundant number, since it is smaller than the sum of its proper divisors (300269321068).

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

204664022420 is a wasteful number, since it uses less digits than its factorization.

204664022420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71560880 (or 71560878 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 204664022420 its reverse (24220466402), we get a palindrome (228884488822).

The spelling of 204664022420 in words is "two hundred four billion, six hundred sixty-four million, twenty-two thousand, four hundred twenty".