203220020 has 24 divisors (see below), whose sum is σ = 434816424. Its totient is φ = 79753856.

The previous prime is 203220007. The next prime is 203220041. The reversal of 203220020 is 20022302.

It can be written as a sum of positive squares in 4 ways, for example, as 27604516 + 175615504 = 5254^2 + 13252^2 .

It is a junction number, because it is equal to n+sod(n) for n = 203219983 and 203220010.

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, 94799 + ... + 96918.

It is an arithmetic number, because the mean of its divisors is an integer number (18117351).

Almost surely, 2^203220020 is an apocalyptic number.

203220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203220020 is an abundant number, since it is smaller than the sum of its proper divisors (231596404).

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

203220020 is a wasteful number, since it uses less digits than its factorization.

203220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191779 (or 191777 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 203220020 is about 14255.5259461024. The cubic root of 203220020 is about 587.9253186964.

Adding to 203220020 its reverse (20022302), we get a palindrome (223242322).

The spelling of 203220020 in words is "two hundred three million, two hundred twenty thousand, twenty".