23503403 has 12 divisors (see below), whose sum is σ = 29526000. Its totient is φ = 18313680.

The previous prime is 23503397. The next prime is 23503411. The reversal of 23503403 is 30430532.

It is not a de Polignac number, because 23503403 - 2⁸ = 23503147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23503423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13028 + ... + 14721.

It is an arithmetic number, because the mean of its divisors is an integer number (2460500).

Almost surely, 2^23503403 is an apocalyptic number.

23503403 is a deficient number, since it is larger than the sum of its proper divisors (6022597).

23503403 is a wasteful number, since it uses less digits than its factorization.

23503403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27778 (or 27767 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 20.

The square root of 23503403 is about 4848.0308373607. The cubic root of 23503403 is about 286.4465410968.

Adding to 23503403 its reverse (30430532), we get a palindrome (53933935).

The spelling of 23503403 in words is "twenty-three million, five hundred three thousand, four hundred three".