23145512321 has 8 divisors (see below), whose sum is σ = 24776642400. Its totient is φ = 21555676800.

The previous prime is 23145512317. The next prime is 23145512333. The reversal of 23145512321 is 12321554132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23145512321 - 2² = 23145512317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23145512311) 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 7 ways as a sum of consecutive naturals, for example, 10322480 + ... + 10324721.

It is an arithmetic number, because the mean of its divisors is an integer number (3097080300).

Almost surely, 2^23145512321 is an apocalyptic number.

It is an amenable number.

23145512321 is a deficient number, since it is larger than the sum of its proper divisors (1631130079).

23145512321 is a wasteful number, since it uses less digits than its factorization.

23145512321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20647279.

The product of its digits is 7200, while the sum is 29.

The spelling of 23145512321 in words is "twenty-three billion, one hundred forty-five million, five hundred twelve thousand, three hundred twenty-one".