23543219845 has 16 divisors (see below), whose sum is σ = 29917807920. Its totient is φ = 17724248064.

The previous prime is 23543219809. The next prime is 23543219873. The reversal of 23543219845 is 54891234532.

It is a Cunningham number, because it is equal to 153438²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 205463556 + 23337756289 = 14334^2 + 152767^2 .

It is a cyclic number.

It is not a de Polignac number, because 23543219845 - 2³³ = 14953285253 is a prime.

It is a super-3 number, since 3×23543219845³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23543219795 and 23543219804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 836929 + ... + 864601.

It is an arithmetic number, because the mean of its divisors is an integer number (1869862995).

Almost surely, 2^23543219845 is an apocalyptic number.

It is an amenable number.

23543219845 is a deficient number, since it is larger than the sum of its proper divisors (6374588075).

23543219845 is a wasteful number, since it uses less digits than its factorization.

23543219845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37704.

The product of its digits is 1036800, while the sum is 46.

The spelling of 23543219845 in words is "twenty-three billion, five hundred forty-three million, two hundred nineteen thousand, eight hundred forty-five".