505303020 has 36 divisors (see below), whose sum is σ = 1532753040. Its totient is φ = 134747424.

The previous prime is 505303003. The next prime is 505303021. The reversal of 505303020 is 20303505.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×505303020² = 510662284042240800, which contains 22 as substring.

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 = 505302984 and 505303002.

It is not an unprimeable number, because it can be changed into a prime (505303021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1403440 + ... + 1403799.

Almost surely, 2^505303020 is an apocalyptic number.

It is an amenable number.

505303020 is an abundant number, since it is smaller than the sum of its proper divisors (1027450020).

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

505303020 is a wasteful number, since it uses less digits than its factorization.

505303020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2807254 (or 2807249 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 18.

The square root of 505303020 is about 22478.9461496753. The cubic root of 505303020 is about 796.4966703294.

Adding to 505303020 its reverse (20303505), we get a palindrome (525606525).

The spelling of 505303020 in words is "five hundred five million, three hundred three thousand, twenty".