200021013 has 12 divisors (see below), whose sum is σ = 293656428. Its totient is φ = 131160960.

The previous prime is 200021011. The next prime is 200021023. The reversal of 200021013 is 310120002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 99560484 + 100460529 = 9978^2 + 10023^2 .

It is not a de Polignac number, because 200021013 - 2¹ = 200021011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 200020986 and 200021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200021011) 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 11 ways as a sum of consecutive naturals, for example, 181620 + ... + 182717.

It is an arithmetic number, because the mean of its divisors is an integer number (24471369).

Almost surely, 2^200021013 is an apocalyptic number.

It is an amenable number.

200021013 is a deficient number, since it is larger than the sum of its proper divisors (93635415).

200021013 is a wasteful number, since it uses less digits than its factorization.

200021013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364404 (or 364401 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 200021013 is about 14142.8785259579. The cubic root of 200021013 is about 584.8240277203.

Adding to 200021013 its reverse (310120002), we get a palindrome (510141015).

The spelling of 200021013 in words is "two hundred million, twenty-one thousand, thirteen".