505503020 has 24 divisors (see below), whose sum is σ = 1158061968. Its totient is φ = 183819200.

The previous prime is 505503013. The next prime is 505503049. The reversal of 505503020 is 20305505.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 505502983 and 505503001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1148651 + ... + 1149090.

It is an arithmetic number, because the mean of its divisors is an integer number (48252582).

Almost surely, 2^505503020 is an apocalyptic number.

It is an amenable number.

505503020 is an abundant number, since it is smaller than the sum of its proper divisors (652558948).

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

505503020 is a wasteful number, since it uses less digits than its factorization.

505503020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297761 (or 2297759 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 20.

The square root of 505503020 is about 22483.3943166952. The cubic root of 505503020 is about 796.6017414883.

Adding to 505503020 its reverse (20305505), we get a palindrome (525808525).

The spelling of 505503020 in words is "five hundred five million, five hundred three thousand, twenty".