10635021 has 24 divisors (see below), whose sum is σ = 15975960. Its totient is φ = 6811776.

The previous prime is 10635011. The next prime is 10635043. The reversal of 10635021 is 12053601.

10635021 is a `hidden beast` number, since 10 + 635 + 0 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7502121 + 3132900 = 2739^2 + 1770^2 .

It is not a de Polignac number, because 10635021 - 2⁷ = 10634893 is a prime.

It is a super-2 number, since 2×10635021² = 226207343340882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10634985 and 10635003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10635011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36151 + ... + 36443.

It is an arithmetic number, because the mean of its divisors is an integer number (665665).

Almost surely, 2^10635021 is an apocalyptic number.

It is an amenable number.

10635021 is a deficient number, since it is larger than the sum of its proper divisors (5340939).

10635021 is a wasteful number, since it uses less digits than its factorization.

10635021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 10635021 is about 3261.1379915606. The cubic root of 10635021 is about 219.9105766047.

Adding to 10635021 its reverse (12053601), we get a palindrome (22688622).

It can be divided in two parts, 1063 and 5021, that added together give a square (6084 = 78²).

The spelling of 10635021 in words is "ten million, six hundred thirty-five thousand, twenty-one".