204478423072 has 96 divisors (see below), whose sum is σ = 503902715904. Its totient is φ = 79349280000.

The previous prime is 204478423069. The next prime is 204478423091. The reversal of 204478423072 is 270324874402.

It is a super-2 number, since 2×204478423072² (a number of 23 digits) contains 22 as substring.

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, 453153 + ... + 783775.

It is an arithmetic number, because the mean of its divisors is an integer number (5248986624).

Almost surely, 2^204478423072 is an apocalyptic number.

204478423072 is a gapful number since it is divisible by the number (22) 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 204478423072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251951357952).

204478423072 is an abundant number, since it is smaller than the sum of its proper divisors (299424292832).

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

204478423072 is a wasteful number, since it uses less digits than its factorization.

204478423072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330902 (or 330894 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 43.

The spelling of 204478423072 in words is "two hundred four billion, four hundred seventy-eight million, four hundred twenty-three thousand, seventy-two".