23220427 has 4 divisors (see below), whose sum is σ = 23231880. Its totient is φ = 23208976.

The previous prime is 23220403. The next prime is 23220437. The reversal of 23220427 is 72402232.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23220427 - 2²³ = 14831819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23220398 and 23220407.

It is not an unprimeable number, because it can be changed into a prime (23220437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1777 + ... + 7042.

It is an arithmetic number, because the mean of its divisors is an integer number (5807970).

Almost surely, 2^23220427 is an apocalyptic number.

23220427 is a deficient number, since it is larger than the sum of its proper divisors (11453).

23220427 is an equidigital number, since it uses as much as digits as its factorization.

23220427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11452.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 23220427 is about 4818.7578274904. The cubic root of 23220427 is about 285.2923111475.

Adding to 23220427 its reverse (72402232), we get a palindrome (95622659).

The spelling of 23220427 in words is "twenty-three million, two hundred twenty thousand, four hundred twenty-seven".