203204540 has 96 divisors (see below), whose sum is σ = 555254784. Its totient is φ = 60572160.

The previous prime is 203204539. The next prime is 203204549. The reversal of 203204540 is 45402302.

It is a super-2 number, since 2×203204540² = 82584170153223200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203204549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32552 + ... + 38288.

It is an arithmetic number, because the mean of its divisors is an integer number (5783904).

Almost surely, 2^203204540 is an apocalyptic number.

203204540 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 203204540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277627392).

203204540 is an abundant number, since it is smaller than the sum of its proper divisors (352050244).

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

203204540 is a wasteful number, since it uses less digits than its factorization.

203204540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5787 (or 5785 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 203204540 is about 14254.9829884150. The cubic root of 203204540 is about 587.9103901884.

Adding to 203204540 its reverse (45402302), we get a palindrome (248606842).

The spelling of 203204540 in words is "two hundred three million, two hundred four thousand, five hundred forty".