203023020 has 48 divisors (see below), whose sum is σ = 571979520. Its totient is φ = 53804736.

The previous prime is 203023003. The next prime is 203023031. The reversal of 203023020 is 20320302.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 203022987 and 203023005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 600 + ... + 20159.

It is an arithmetic number, because the mean of its divisors is an integer number (11916240).

Almost surely, 2^203023020 is an apocalyptic number.

203023020 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 203023020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285989760).

203023020 is an abundant number, since it is smaller than the sum of its proper divisors (368956500).

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

203023020 is a wasteful number, since it uses less digits than its factorization.

203023020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20934 (or 20932 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 203023020 is about 14248.6146695038. The cubic root of 203023020 is about 587.7352804423.

Adding to 203023020 its reverse (20320302), we get a palindrome (223343322).

The spelling of 203023020 in words is "two hundred three million, twenty-three thousand, twenty".