203475728520 has 48 divisors (see below), whose sum is σ = 661296118860. Its totient is φ = 54260194176.

The previous prime is 203475728461. The next prime is 203475728569. The reversal of 203475728520 is 25827574302.

203475728520 is a `hidden beast` number, since 2 + 0 + 34 + 75 + 7 + 28 + 520 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 197781215076 + 5694513444 = 444726^2 + 75462^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282604819 + ... + 282605538.

Almost surely, 2^203475728520 is an apocalyptic number.

203475728520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203475728520 is an abundant number, since it is smaller than the sum of its proper divisors (457820390340).

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

203475728520 is a wasteful number, since it uses less digits than its factorization.

203475728520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565210374 (or 565210367 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 45.

The spelling of 203475728520 in words is "two hundred three billion, four hundred seventy-five million, seven hundred twenty-eight thousand, five hundred twenty".