503230311020 has 48 divisors (see below), whose sum is σ = 1104115174848. Its totient is φ = 192298571520.

The previous prime is 503230311011. The next prime is 503230311079. The reversal of 503230311020 is 20113032305.

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 = 503230310983 and 503230311001.

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, 319691 + ... + 1052930.

It is an arithmetic number, because the mean of its divisors is an integer number (23002399476).

Almost surely, 2^503230311020 is an apocalyptic number.

It is an amenable number.

503230311020 is an abundant number, since it is smaller than the sum of its proper divisors (600884863828).

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

503230311020 is a wasteful number, since it uses less digits than its factorization.

503230311020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373450 (or 1373448 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

Adding to 503230311020 its reverse (20113032305), we get a palindrome (523343343325).

The spelling of 503230311020 in words is "five hundred three billion, two hundred thirty million, three hundred eleven thousand, twenty".