23253440405 has 16 divisors (see below), whose sum is σ = 30067436784. Its totient is φ = 17162150400.

The previous prime is 23253440347. The next prime is 23253440437. The reversal of 23253440405 is 50404435232.

It can be written as a sum of positive squares in 8 ways, for example, as 3203446801 + 20049993604 = 56599^2 + 141598^2 .

It is not a de Polignac number, because 23253440405 - 2¹² = 23253436309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17747 + ... + 216383.

It is an arithmetic number, because the mean of its divisors is an integer number (1879214799).

Almost surely, 2^23253440405 is an apocalyptic number.

It is an amenable number.

23253440405 is a deficient number, since it is larger than the sum of its proper divisors (6813996379).

23253440405 is a wasteful number, since it uses less digits than its factorization.

23253440405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200456.

The product of its (nonzero) digits is 57600, while the sum is 32.

Adding to 23253440405 its reverse (50404435232), we get a palindrome (73657875637).

The spelling of 23253440405 in words is "twenty-three billion, two hundred fifty-three million, four hundred forty thousand, four hundred five".