23420427 has 4 divisors (see below), whose sum is σ = 31227240. Its totient is φ = 15613616.

The previous prime is 23420387. The next prime is 23420437. The reversal of 23420427 is 72402432.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23420427 - 2⁶ = 23420363 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23420397 and 23420406.

It is not an unprimeable number, because it can be changed into a prime (23420437) 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 3 ways as a sum of consecutive naturals, for example, 3903402 + ... + 3903407.

It is an arithmetic number, because the mean of its divisors is an integer number (7806810).

Almost surely, 2^23420427 is an apocalyptic number.

23420427 is a deficient number, since it is larger than the sum of its proper divisors (7806813).

23420427 is an equidigital number, since it uses as much as digits as its factorization.

23420427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7806812.

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 23420427 is about 4839.4655696678. The cubic root of 23420427 is about 286.1090550251.

Adding to 23420427 its reverse (72402432), we get a palindrome (95822859).

The spelling of 23420427 in words is "twenty-three million, four hundred twenty thousand, four hundred twenty-seven".