23145405344 has 24 divisors (see below), whose sum is σ = 48247960068. Its totient is φ = 10891955200.

The previous prime is 23145405317. The next prime is 23145405391. The reversal of 23145405344 is 44350454132.

It can be written as a sum of positive squares in 2 ways, for example, as 20854825744 + 2290579600 = 144412^2 + 47860^2 .

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 3 ways as a sum of consecutive naturals, for example, 21272807 + ... + 21273894.

Almost surely, 2^23145405344 is an apocalyptic number.

It is an amenable number.

23145405344 is an abundant number, since it is smaller than the sum of its proper divisors (25102554724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23145405344 is a wasteful number, since it uses less digits than its factorization.

23145405344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42546728 (or 42546720 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 23145405344 its reverse (44350454132), we get a palindrome (67495859476).

The spelling of 23145405344 in words is "twenty-three billion, one hundred forty-five million, four hundred five thousand, three hundred forty-four".