10018521 has 12 divisors (see below), whose sum is σ = 14537380. Its totient is φ = 6648480.

The previous prime is 10018513. The next prime is 10018553. The reversal of 10018521 is 12581001.

It can be written as a sum of positive squares in 2 ways, for example, as 9272025 + 746496 = 3045^2 + 864^2 .

It is not a de Polignac number, because 10018521 - 2³ = 10018513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10018494 and 10018503.

It is not an unprimeable number, because it can be changed into a prime (10018511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370 + ... + 4491.

Almost surely, 2^10018521 is an apocalyptic number.

It is an amenable number.

10018521 is a deficient number, since it is larger than the sum of its proper divisors (4518859).

10018521 is a wasteful number, since it uses less digits than its factorization.

10018521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5096 (or 5093 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 10018521 is about 3165.2047327148. The cubic root of 10018521 is about 215.5763945894.

Adding to 10018521 its reverse (12581001), we get a palindrome (22599522).

The spelling of 10018521 in words is "ten million, eighteen thousand, five hundred twenty-one".