23505550430421 has 16 divisors (see below), whose sum is σ = 31463994435200. Its totient is φ = 15608848039488.

The previous prime is 23505550430413. The next prime is 23505550430437. The reversal of 23505550430421 is 12403405550532.

It is not a de Polignac number, because 23505550430421 - 2³ = 23505550430413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23505550430421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23505550430471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13073761 + ... + 14762598.

It is an arithmetic number, because the mean of its divisors is an integer number (1966499652200).

Almost surely, 2^{23505550430421} is an apocalyptic number.

It is an amenable number.

23505550430421 is a deficient number, since it is larger than the sum of its proper divisors (7958444004779).

23505550430421 is a wasteful number, since it uses less digits than its factorization.

23505550430421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27837468.

The product of its (nonzero) digits is 360000, while the sum is 39.

Adding to 23505550430421 its reverse (12403405550532), we get a palindrome (35908955980953).

The spelling of 23505550430421 in words is "twenty-three trillion, five hundred five billion, five hundred fifty million, four hundred thirty thousand, four hundred twenty-one".