23505403 has 2 divisors, whose sum is σ = 23505404. Its totient is φ = 23505402.

The previous prime is 23505367. The next prime is 23505431. The reversal of 23505403 is 30450532.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23505403 - 2²¹ = 21408251 is a prime.

It is not a weakly prime, because it can be changed into another prime (23505463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11752701 + 11752702.

It is an arithmetic number, because the mean of its divisors is an integer number (11752702).

Almost surely, 2^23505403 is an apocalyptic number.

23505403 is a deficient number, since it is larger than the sum of its proper divisors (1).

23505403 is an equidigital number, since it uses as much as digits as its factorization.

23505403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 23505403 is about 4848.2371022878. The cubic root of 23505403 is about 286.4546658328.

Adding to 23505403 its reverse (30450532), we get a palindrome (53955935).

The spelling of 23505403 in words is "twenty-three million, five hundred five thousand, four hundred three".