23145523421 has 8 divisors (see below), whose sum is σ = 23365317024. Its totient is φ = 22925794480.

The previous prime is 23145523399. The next prime is 23145523439. The reversal of 23145523421 is 12432554132.

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 23145523421 - 2¹⁰ = 23145522397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23145525421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1008686 + ... + 1031376.

It is an arithmetic number, because the mean of its divisors is an integer number (2920664628).

Almost surely, 2^23145523421 is an apocalyptic number.

It is an amenable number.

23145523421 is a deficient number, since it is larger than the sum of its proper divisors (219793603).

23145523421 is a wasteful number, since it uses less digits than its factorization.

23145523421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32331.

The product of its digits is 28800, while the sum is 32.

The spelling of 23145523421 in words is "twenty-three billion, one hundred forty-five million, five hundred twenty-three thousand, four hundred twenty-one".