23420403 has 6 divisors (see below), whose sum is σ = 33829484. Its totient is φ = 15613596.

The previous prime is 23420387. The next prime is 23420437. The reversal of 23420403 is 30402432.

It is not a de Polignac number, because 23420403 - 2⁴ = 23420387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23420443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1301125 + ... + 1301142.

Almost surely, 2^23420403 is an apocalyptic number.

23420403 is a deficient number, since it is larger than the sum of its proper divisors (10409081).

23420403 is a wasteful number, since it uses less digits than its factorization.

23420403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2602273 (or 2602270 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 23420403 is about 4839.4630900545. The cubic root of 23420403 is about 286.1089572954.

Adding to 23420403 its reverse (30402432), we get a palindrome (53822835).

The spelling of 23420403 in words is "twenty-three million, four hundred twenty thousand, four hundred three".