23220012 has 24 divisors (see below), whose sum is σ = 54597312. Its totient is φ = 7680400.

The previous prime is 23219983. The next prime is 23220019. The reversal of 23220012 is 21002232.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 23220012.

It is not an unprimeable number, because it can be changed into a prime (23220019) 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, 5814 + ... + 8957.

It is an arithmetic number, because the mean of its divisors is an integer number (2274888).

Almost surely, 2^23220012 is an apocalyptic number.

It is an amenable number.

23220012 is an abundant number, since it is smaller than the sum of its proper divisors (31377300).

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

23220012 is a wasteful number, since it uses less digits than its factorization.

23220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14909 (or 14907 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 23220012 is about 4818.7147664082. The cubic root of 23220012 is about 285.2906115374.

Adding to 23220012 its reverse (21002232), we get a palindrome (44222244).

The spelling of 23220012 in words is "twenty-three million, two hundred twenty thousand, twelve".