23403555 has 24 divisors (see below), whose sum is σ = 46361952. Its totient is φ = 10698624.

The previous prime is 23403533. The next prime is 23403559. The reversal of 23403555 is 55530432.

It is not a de Polignac number, because 23403555 - 2⁹ = 23403043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23403559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36834 + ... + 37463.

It is an arithmetic number, because the mean of its divisors is an integer number (1931748).

Almost surely, 2^23403555 is an apocalyptic number.

23403555 is a deficient number, since it is larger than the sum of its proper divisors (22958397).

23403555 is a wasteful number, since it uses less digits than its factorization.

23403555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74315 (or 74312 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 27.

The square root of 23403555 is about 4837.7220879253. The cubic root of 23403555 is about 286.0403345073.

Adding to 23403555 its reverse (55530432), we get a palindrome (78933987).

The spelling of 23403555 in words is "twenty-three million, four hundred three thousand, five hundred fifty-five".