23420503 has 4 divisors (see below), whose sum is σ = 23635480. Its totient is φ = 23205528.

The previous prime is 23420479. The next prime is 23420533. The reversal of 23420503 is 30502432.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23420503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23420533) 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, 107325 + ... + 107542.

It is an arithmetic number, because the mean of its divisors is an integer number (5908870).

Almost surely, 2^23420503 is an apocalyptic number.

23420503 is a deficient number, since it is larger than the sum of its proper divisors (214977).

23420503 is a wasteful number, since it uses less digits than its factorization.

23420503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214976.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 23420503 is about 4839.4734217681. The cubic root of 23420503 is about 286.1093645023.

Adding to 23420503 its reverse (30502432), we get a palindrome (53922935).

The spelling of 23420503 in words is "twenty-three million, four hundred twenty thousand, five hundred three".