511500020 has 12 divisors (see below), whose sum is σ = 1074150084. Its totient is φ = 204600000.

The previous prime is 511500019. The next prime is 511500023. The reversal of 511500020 is 20005115.

It can be written as a sum of positive squares in 2 ways, for example, as 292341604 + 219158416 = 17098^2 + 14804^2 .

It is a junction number, because it is equal to n+sod(n) for n = 511499968 and 511500004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511500023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12787481 + ... + 12787520.

It is an arithmetic number, because the mean of its divisors is an integer number (89512507).

Almost surely, 2^511500020 is an apocalyptic number.

It is an amenable number.

511500020 is an abundant number, since it is smaller than the sum of its proper divisors (562650064).

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

511500020 is a wasteful number, since it uses less digits than its factorization.

511500020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25575010 (or 25575008 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 511500020 is about 22616.3661979550. The cubic root of 511500020 is about 799.7395089397.

Adding to 511500020 its reverse (20005115), we get a palindrome (531505135).

The spelling of 511500020 in words is "five hundred eleven million, five hundred thousand, twenty".