20535201 has 28 divisors (see below), whose sum is σ = 32619492. Its totient is φ = 12877056.

The previous prime is 20535197. The next prime is 20535211. The reversal of 20535201 is 10253502.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11390625 + 9144576 = 3375^2 + 3024^2 .

It is not a de Polignac number, because 20535201 - 2² = 20535197 is a prime.

It is a super-2 number, since 2×20535201² = 843388960220802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20535211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 11565 + ... + 13221.

Almost surely, 2^20535201 is an apocalyptic number.

It is an amenable number.

20535201 is a deficient number, since it is larger than the sum of its proper divisors (12084291).

20535201 is an equidigital number, since it uses as much as digits as its factorization.

20535201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692 (or 1677 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 20535201 is about 4531.5782019071. The cubic root of 20535201 is about 273.8417444417.

Adding to 20535201 its reverse (10253502), we get a palindrome (30788703).

It can be divided in two parts, 20535 and 201, that added together give a 4-th power (20736 = 12⁴).

The spelling of 20535201 in words is "twenty million, five hundred thirty-five thousand, two hundred one".