23036405 has 16 divisors (see below), whose sum is σ = 31777920. Its totient is φ = 15703872.

The previous prime is 23036393. The next prime is 23036407. The reversal of 23036405 is 50463032.

23036405 = 266² + 267² + ... + 444².

It is a cyclic number.

It is not a de Polignac number, because 23036405 - 2⁴ = 23036389 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23036407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4427 + ... + 8103.

It is an arithmetic number, because the mean of its divisors is an integer number (1986120).

Almost surely, 2^23036405 is an apocalyptic number.

It is an amenable number.

23036405 is a deficient number, since it is larger than the sum of its proper divisors (8741515).

23036405 is a wasteful number, since it uses less digits than its factorization.

23036405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3868.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 23036405 is about 4799.6255062244. The cubic root of 23036405 is about 284.5366637845.

Adding to 23036405 its reverse (50463032), we get a palindrome (73499437).

The spelling of 23036405 in words is "twenty-three million, thirty-six thousand, four hundred five".