203423500 has 216 divisors, whose sum is σ = 569159136. Its totient is φ = 63201600.

The previous prime is 203423489. The next prime is 203423501. The reversal of 203423500 is 5324302.

It is a super-2 number, since 2×203423500² = 82762240704500000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (203423501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8844489 + ... + 8844511.

It is an arithmetic number, because the mean of its divisors is an integer number (2634996).

Almost surely, 2^203423500 is an apocalyptic number.

203423500 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 203423500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284579568).

203423500 is an abundant number, since it is smaller than the sum of its proper divisors (365735636).

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

203423500 is a wasteful number, since it uses less digits than its factorization.

203423500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 56 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 203423500 is about 14262.6610420356. The cubic root of 203423500 is about 588.1214790583.

Adding to 203423500 its reverse (5324302), we get a palindrome (208747802).

The spelling of 203423500 in words is "two hundred three million, four hundred twenty-three thousand, five hundred".