23220011 has 16 divisors (see below), whose sum is σ = 25272000. Its totient is φ = 21255168.

The previous prime is 23219983. The next prime is 23220019. The reversal of 23220011 is 11002232.

It is a happy number.

It is not a de Polignac number, because 23220011 - 2¹⁴ = 23203627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23219974 and 23220001.

It is not an unprimeable number, because it can be changed into a prime (23220019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155765 + ... + 155913.

It is an arithmetic number, because the mean of its divisors is an integer number (1579500).

Almost surely, 2^23220011 is an apocalyptic number.

23220011 is a deficient number, since it is larger than the sum of its proper divisors (2051989).

23220011 is a wasteful number, since it uses less digits than its factorization.

23220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 23220011 is about 4818.7146626460. The cubic root of 23220011 is about 285.2906074419.

Adding to 23220011 its reverse (11002232), we get a palindrome (34222243).

The spelling of 23220011 in words is "twenty-three million, two hundred twenty thousand, eleven".