518498020 has 24 divisors (see below), whose sum is σ = 1118275704. Its totient is φ = 201793536.

The previous prime is 518497981. The next prime is 518498027. The reversal of 518498020 is 20894815.

It can be written as a sum of positive squares in 4 ways, for example, as 173132964 + 345365056 = 13158^2 + 18584^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (518498027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349597 + ... + 351076.

It is an arithmetic number, because the mean of its divisors is an integer number (46594821).

Almost surely, 2^518498020 is an apocalyptic number.

It is an amenable number.

518498020 is an abundant number, since it is smaller than the sum of its proper divisors (599777684).

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

518498020 is a wasteful number, since it uses less digits than its factorization.

518498020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700719 (or 700717 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 518498020 is about 22770.5515963053. The cubic root of 518498020 is about 803.3701679400.

The spelling of 518498020 in words is "five hundred eighteen million, four hundred ninety-eight thousand, twenty".