23203220 has 12 divisors (see below), whose sum is σ = 48726804. Its totient is φ = 9281280.

The previous prime is 23203207. The next prime is 23203223. The reversal of 23203220 is 2230232.

It can be written as a sum of positive squares in 2 ways, for example, as 13293316 + 9909904 = 3646^2 + 3148^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23203195 and 23203204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23203223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 580061 + ... + 580100.

It is an arithmetic number, because the mean of its divisors is an integer number (4060567).

Almost surely, 2^23203220 is an apocalyptic number.

23203220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23203220 is an abundant number, since it is smaller than the sum of its proper divisors (25523584).

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

23203220 is a wasteful number, since it uses less digits than its factorization.

23203220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160170 (or 1160168 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 23203220 is about 4816.9720779760. The cubic root of 23203220 is about 285.2218238150.

Adding to 23203220 its reverse (2230232), we get a palindrome (25433452).

The spelling of 23203220 in words is "twenty-three million, two hundred three thousand, two hundred twenty".