200001020 has 24 divisors (see below), whose sum is σ = 425758704. Its totient is φ = 78903936.

The previous prime is 200001019. The next prime is 200001047. The reversal of 200001020 is 20100002.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a junction number, because it is equal to n+sod(n) for n = 200000995 and 200001013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67034 + ... + 69953.

It is an arithmetic number, because the mean of its divisors is an integer number (17739946).

Almost surely, 2^200001020 is an apocalyptic number.

200001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200001020 is an abundant number, since it is smaller than the sum of its proper divisors (225757684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

200001020 is a wasteful number, since it uses less digits than its factorization.

200001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137069 (or 137067 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 200001020 is about 14142.1716861308. The cubic root of 200001020 is about 584.8045418069.

Adding to 200001020 its reverse (20100002), we get a palindrome (220101022).

The spelling of 200001020 in words is "two hundred million, one thousand, twenty".