200020 has 24 divisors (see below), whose sum is σ = 428904. Its totient is φ = 78336.

The previous prime is 200017. The next prime is 200023. The reversal of 200020 is 20002.

It is an interprime number because it is at equal distance from previous prime (200017) and next prime (200023).

It can be written as a sum of positive squares in 4 ways, for example, as 30276 + 169744 = 174^2 + 412^2 .

It is a Harshad number since it is a multiple of its sum of digits (4).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 199982 and 200009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1392 + ... + 1528.

It is an arithmetic number, because the mean of its divisors is an integer number (17871).

2²⁰⁰⁰²⁰ is an apocalyptic number.

200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200020 is an abundant number, since it is smaller than the sum of its proper divisors (228884).

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

200020 is a wasteful number, since it uses less digits than its factorization.

200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 217 counting only the distinct ones).

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

The square root of 200020 is about 447.2359556207. The cubic root of 200020 is about 58.4823040444.

Adding to 200020 its reverse (20002), we get a palindrome (220022).

It can be divided in two parts, 2000 and 20, that multiplied together give a square (40000 = 200²).

The spelling of 200020 in words is "two hundred thousand, twenty", and thus it is an iban number.