203203321020 has 72 divisors (see below), whose sum is σ = 704438183904. Its totient is φ = 46446473088.

The previous prime is 203203321019. The next prime is 203203321037. The reversal of 203203321020 is 20123302302.

It is a happy number.

203203321020 is a `hidden beast` number, since 2 + 0 + 320 + 3 + 321 + 0 + 20 = 666.

203203321020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 = 203203320984 and 203203321002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80634979 + ... + 80637498.

Almost surely, 2^203203321020 is an apocalyptic number.

203203321020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203203321020 is an abundant number, since it is smaller than the sum of its proper divisors (501234862884).

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

203203321020 is a wasteful number, since it uses less digits than its factorization.

203203321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161272499 (or 161272494 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 203203321020 its reverse (20123302302), we get a palindrome (223326623322).

The spelling of 203203321020 in words is "two hundred three billion, two hundred three million, three hundred twenty-one thousand, twenty".