23156403 has 16 divisors (see below), whose sum is σ = 32039040. Its totient is φ = 14865984.

The previous prime is 23156347. The next prime is 23156417. The reversal of 23156403 is 30465132.

It is a happy number.

It is not a de Polignac number, because 23156403 - 2¹³ = 23148211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23156503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8188 + ... + 10646.

It is an arithmetic number, because the mean of its divisors is an integer number (2002440).

Almost surely, 2^23156403 is an apocalyptic number.

23156403 is a deficient number, since it is larger than the sum of its proper divisors (8882637).

23156403 is a wasteful number, since it uses less digits than its factorization.

23156403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2578.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 23156403 is about 4812.1100361484. The cubic root of 23156403 is about 285.0298645220.

The spelling of 23156403 in words is "twenty-three million, one hundred fifty-six thousand, four hundred three".