520700018 has 8 divisors (see below), whose sum is σ = 789826140. Its totient is φ = 257424640.

The previous prime is 520700003. The next prime is 520700023. The reversal of 520700018 is 810007025.

It can be written as a sum of positive squares in 2 ways, for example, as 513339649 + 7360369 = 22657^2 + 2713^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×520700018² = 542257017490400648, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 520699966 and 520700002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1462463 + ... + 1462818.

Almost surely, 2^520700018 is an apocalyptic number.

520700018 is a deficient number, since it is larger than the sum of its proper divisors (269126122).

520700018 is a wasteful number, since it uses less digits than its factorization.

520700018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2925372.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 520700018 is about 22818.8522498394. The cubic root of 520700018 is about 804.5058335592.

The spelling of 520700018 in words is "five hundred twenty million, seven hundred thousand, eighteen".