23450555821 has 16 divisors (see below), whose sum is σ = 29526542208. Its totient is φ = 18092232000.

The previous prime is 23450555767. The next prime is 23450555861. The reversal of 23450555821 is 12855505432.

It is a cyclic number.

It is not a de Polignac number, because 23450555821 - 2¹¹ = 23450553773 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 (23450555861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1499910 + ... + 1515463.

It is an arithmetic number, because the mean of its divisors is an integer number (1845408888).

Almost surely, 2^23450555821 is an apocalyptic number.

It is an amenable number.

23450555821 is a deficient number, since it is larger than the sum of its proper divisors (6075986387).

23450555821 is a wasteful number, since it uses less digits than its factorization.

23450555821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3015492.

The product of its (nonzero) digits is 240000, while the sum is 40.

The spelling of 23450555821 in words is "twenty-three billion, four hundred fifty million, five hundred fifty-five thousand, eight hundred twenty-one".