23145233105421 has 36 divisors (see below), whose sum is σ = 38971480579200. Its totient is φ = 13198235995728.

The previous prime is 23145233105317. The next prime is 23145233105429. The reversal of 23145233105421 is 12450133254132.

23145233105421 is a `hidden beast` number, since 2 + 3 + 1 + 4 + 523 + 3 + 105 + 4 + 21 = 666.

It is not a de Polignac number, because 23145233105421 - 2³³ = 23136643170829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23145233105429) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 54573231 + ... + 54995708.

It is an arithmetic number, because the mean of its divisors is an integer number (1082541127200).

Almost surely, 2^{23145233105421} is an apocalyptic number.

23145233105421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23145233105421 is a deficient number, since it is larger than the sum of its proper divisors (15826247473779).

23145233105421 is a wasteful number, since it uses less digits than its factorization.

23145233105421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109569438 (or 109569428 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 23145233105421 its reverse (12450133254132), we get a palindrome (35595366359553).

The spelling of 23145233105421 in words is "twenty-three trillion, one hundred forty-five billion, two hundred thirty-three million, one hundred five thousand, four hundred twenty-one".