23011405 has 4 divisors (see below), whose sum is σ = 27613692. Its totient is φ = 18409120.

The previous prime is 23011397. The next prime is 23011427. The reversal of 23011405 is 50411032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8219689 + 14791716 = 2867^2 + 3846^2 .

It is not a de Polignac number, because 23011405 - 2³ = 23011397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2301136 + ... + 2301145.

It is an arithmetic number, because the mean of its divisors is an integer number (6903423).

Almost surely, 2^23011405 is an apocalyptic number.

It is an amenable number.

23011405 is a deficient number, since it is larger than the sum of its proper divisors (4602287).

23011405 is an equidigital number, since it uses as much as digits as its factorization.

23011405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4602286.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 23011405 is about 4797.0204293916. The cubic root of 23011405 is about 284.4336964537.

Adding to 23011405 its reverse (50411032), we get a palindrome (73422437).

The spelling of 23011405 in words is "twenty-three million, eleven thousand, four hundred five".