204421545154500 has 192 divisors, whose sum is σ = 598327256217600. Its totient is φ = 54233006256000.

The previous prime is 204421545154493. The next prime is 204421545154571. The reversal of 204421545154500 is 5451545124402.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3578090935 + ... + 3578148065.

It is an arithmetic number, because the mean of its divisors is an integer number (3116287792800).

Almost surely, 2^{204421545154500} is an apocalyptic number.

204421545154500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204421545154500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299163628108800).

204421545154500 is an abundant number, since it is smaller than the sum of its proper divisors (393905711063100).

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

204421545154500 is a wasteful number, since it uses less digits than its factorization.

204421545154500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69339 (or 69327 counting only the distinct ones).

The product of its (nonzero) digits is 640000, while the sum is 42.

The spelling of 204421545154500 in words is "two hundred four trillion, four hundred twenty-one billion, five hundred forty-five million, one hundred fifty-four thousand, five hundred".