206503020 has 120 divisors (see below), whose sum is σ = 682004400. Its totient is φ = 52161408.

The previous prime is 206503013. The next prime is 206503021. The reversal of 206503020 is 20305602.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 206502984 and 206503002.

It is not an unprimeable number, because it can be changed into a prime (206503021) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 27426 + ... + 34134.

It is an arithmetic number, because the mean of its divisors is an integer number (5683370).

Almost surely, 2^206503020 is an apocalyptic number.

206503020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206503020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341002200).

206503020 is an abundant number, since it is smaller than the sum of its proper divisors (475501380).

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

206503020 is a wasteful number, since it uses less digits than its factorization.

206503020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6749 (or 6738 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 206503020 is about 14370.2129420548. The cubic root of 206503020 is about 591.0743805995.

Adding to 206503020 its reverse (20305602), we get a palindrome (226808622).

The spelling of 206503020 in words is "two hundred six million, five hundred three thousand, twenty".