23420147 has 4 divisors (see below), whose sum is σ = 23918496. Its totient is φ = 22921800.

The previous prime is 23420123. The next prime is 23420167. The reversal of 23420147 is 74102432.

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 23420147 - 2¹² = 23416051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23420107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249104 + ... + 249197.

It is an arithmetic number, because the mean of its divisors is an integer number (5979624).

Almost surely, 2^23420147 is an apocalyptic number.

23420147 is a deficient number, since it is larger than the sum of its proper divisors (498349).

23420147 is an equidigital number, since it uses as much as digits as its factorization.

23420147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498348.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 23420147 is about 4839.4366407672. The cubic root of 23420147 is about 286.1079148402.

Adding to 23420147 its reverse (74102432), we get a palindrome (97522579).

The spelling of 23420147 in words is "twenty-three million, four hundred twenty thousand, one hundred forty-seven".