203080820 has 24 divisors (see below), whose sum is σ = 427329000. Its totient is φ = 81068672.

The previous prime is 203080781. The next prime is 203080841. The reversal of 203080820 is 28080302.

It can be written as a sum of positive squares in 4 ways, for example, as 13853284 + 189227536 = 3722^2 + 13756^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206 + ... + 20154.

It is an arithmetic number, because the mean of its divisors is an integer number (17805375).

Almost surely, 2^203080820 is an apocalyptic number.

203080820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203080820 is an abundant number, since it is smaller than the sum of its proper divisors (224248180).

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

203080820 is a wasteful number, since it uses less digits than its factorization.

203080820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20467 (or 20465 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 203080820 is about 14250.6427925199. The cubic root of 203080820 is about 587.7910505973.

The spelling of 203080820 in words is "two hundred three million, eighty thousand, eight hundred twenty".