23145344473 has 4 divisors (see below), whose sum is σ = 23146950528. Its totient is φ = 23143738420.

The previous prime is 23145344461. The next prime is 23145344479. The reversal of 23145344473 is 37444354132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23145344473 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23145344479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 781213 + ... + 810298.

It is an arithmetic number, because the mean of its divisors is an integer number (5786737632).

Almost surely, 2^23145344473 is an apocalyptic number.

It is an amenable number.

23145344473 is a deficient number, since it is larger than the sum of its proper divisors (1606055).

23145344473 is a wasteful number, since it uses less digits than its factorization.

23145344473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606054.

The product of its digits is 483840, while the sum is 40.

The spelling of 23145344473 in words is "twenty-three billion, one hundred forty-five million, three hundred forty-four thousand, four hundred seventy-three".