23105431505 has 16 divisors (see below), whose sum is σ = 29874432000. Its totient is φ = 17053841088.

The previous prime is 23105431501. The next prime is 23105431513. The reversal of 23105431505 is 50513450132.

It is a cyclic number.

It is not a de Polignac number, because 23105431505 - 2² = 23105431501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23105431501) by changing a digit.

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, 41024 + ... + 218846.

It is an arithmetic number, because the mean of its divisors is an integer number (1867152000).

Almost surely, 2^23105431505 is an apocalyptic number.

It is an amenable number.

23105431505 is a deficient number, since it is larger than the sum of its proper divisors (6769000495).

23105431505 is a wasteful number, since it uses less digits than its factorization.

23105431505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179840.

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 23105431505 its reverse (50513450132), we get a palindrome (73618881637).

The spelling of 23105431505 in words is "twenty-three billion, one hundred five million, four hundred thirty-one thousand, five hundred five".