23201203220 has 72 divisors (see below), whose sum is σ = 55738647384. Its totient is φ = 8062654464.

The previous prime is 23201203219. The next prime is 23201203231. The reversal of 23201203220 is 2230210232.

It can be written as a sum of positive squares in 12 ways, for example, as 783328144 + 22417875076 = 27988^2 + 149726^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 79247 + ... + 229526.

Almost surely, 2^23201203220 is an apocalyptic number.

23201203220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23201203220 is an abundant number, since it is smaller than the sum of its proper divisors (32537444164).

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

23201203220 is a wasteful number, since it uses less digits than its factorization.

23201203220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308829 (or 308810 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 23201203220 its reverse (2230210232), we get a palindrome (25431413452).

The spelling of 23201203220 in words is "twenty-three billion, two hundred one million, two hundred three thousand, two hundred twenty".