20210536 has 8 divisors (see below), whose sum is σ = 37894770. Its totient is φ = 10105264.

The previous prime is 20210513. The next prime is 20210539. The reversal of 20210536 is 63501202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12888100 + 7322436 = 3590^2 + 2706^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (20210539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1263151 + ... + 1263166.

Almost surely, 2^20210536 is an apocalyptic number.

It is an amenable number.

20210536 is a deficient number, since it is larger than the sum of its proper divisors (17684234).

20210536 is a wasteful number, since it uses less digits than its factorization.

20210536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526323 (or 2526319 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20210536 is about 4495.6129726657. The cubic root of 20210536 is about 272.3909099572.

Adding to 20210536 its reverse (63501202), we get a palindrome (83711738).

The spelling of 20210536 in words is "twenty million, two hundred ten thousand, five hundred thirty-six".