204030511020 has 144 divisors (see below), whose sum is σ = 721740801600. Its totient is φ = 46635531264.

The previous prime is 204030511019. The next prime is 204030511109. The reversal of 204030511020 is 20115030402.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 204030510984 and 204030511002.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1590597 + ... + 1714076.

It is an arithmetic number, because the mean of its divisors is an integer number (5012088900).

Almost surely, 2^204030511020 is an apocalyptic number.

204030511020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204030511020 is an abundant number, since it is smaller than the sum of its proper divisors (517710290580).

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

204030511020 is a wasteful number, since it uses less digits than its factorization.

204030511020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3304709 (or 3304690 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 204030511020 its reverse (20115030402), we get a palindrome (224145541422).

It can be divided in two parts, 2040305 and 11020, that added together give a triangular number (2051325 = T₂₀₂₅).

The spelling of 204030511020 in words is "two hundred four billion, thirty million, five hundred eleven thousand, twenty".