23043220 has 12 divisors (see below), whose sum is σ = 48390804. Its totient is φ = 9217280.

The previous prime is 23043203. The next prime is 23043221. The reversal of 23043220 is 2234032.

It can be written as a sum of positive squares in 2 ways, for example, as 15225604 + 7817616 = 3902^2 + 2796^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23043194 and 23043203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23043221) 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, 576061 + ... + 576100.

It is an arithmetic number, because the mean of its divisors is an integer number (4032567).

Almost surely, 2^23043220 is an apocalyptic number.

23043220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23043220 is an abundant number, since it is smaller than the sum of its proper divisors (25347584).

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

23043220 is a wasteful number, since it uses less digits than its factorization.

23043220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152170 (or 1152168 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 23043220 is about 4800.3354049483. The cubic root of 23043220 is about 284.5647197561.

Adding to 23043220 its reverse (2234032), we get a palindrome (25277252).

The spelling of 23043220 in words is "twenty-three million, forty-three thousand, two hundred twenty".