23017405 has 16 divisors (see below), whose sum is σ = 29378160. Its totient is φ = 17312256.

The previous prime is 23017403. The next prime is 23017433. The reversal of 23017405 is 50471032.

It can be written as a sum of positive squares in 8 ways, for example, as 1976836 + 21040569 = 1406^2 + 4587^2 .

It is not a de Polignac number, because 23017405 - 2¹ = 23017403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23017403) 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, 24097 + ... + 25033.

It is an arithmetic number, because the mean of its divisors is an integer number (1836135).

Almost surely, 2^23017405 is an apocalyptic number.

It is an amenable number.

23017405 is a deficient number, since it is larger than the sum of its proper divisors (6360755).

23017405 is an frugal number, since it uses more digits than its factorization.

23017405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993 (or 959 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 23017405 is about 4797.6457768368. The cubic root of 23017405 is about 284.4584154119.

Adding to 23017405 its reverse (50471032), we get a palindrome (73488437).

The spelling of 23017405 in words is "twenty-three million, seventeen thousand, four hundred five".