23220560 has 40 divisors (see below), whose sum is σ = 58898016. Its totient is φ = 8443520.

The previous prime is 23220551. The next prime is 23220563. The reversal of 23220560 is 6502232.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23220563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12314 + ... + 14073.

Almost surely, 2^23220560 is an apocalyptic number.

23220560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23220560 is an abundant number, since it is smaller than the sum of its proper divisors (35677456).

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

23220560 is a wasteful number, since it uses less digits than its factorization.

23220560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26411 (or 26405 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 23220560 is about 4818.7716277076. The cubic root of 23220560 is about 285.2928558375.

Adding to 23220560 its reverse (6502232), we get a palindrome (29722792).

The spelling of 23220560 in words is "twenty-three million, two hundred twenty thousand, five hundred sixty".