204785322420 has 48 divisors (see below), whose sum is σ = 655313033088. Its totient is φ = 46808073600.

The previous prime is 204785322377. The next prime is 204785322421. The reversal of 204785322420 is 24223587402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204785322421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243791631 + ... + 243792470.

It is an arithmetic number, because the mean of its divisors is an integer number (13652354856).

Almost surely, 2^204785322420 is an apocalyptic number.

204785322420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204785322420 is an abundant number, since it is smaller than the sum of its proper divisors (450527710668).

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

204785322420 is a wasteful number, since it uses less digits than its factorization.

204785322420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487584120 (or 487584118 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 39.

The spelling of 204785322420 in words is "two hundred four billion, seven hundred eighty-five million, three hundred twenty-two thousand, four hundred twenty".