23403353044521 has 16 divisors (see below), whose sum is σ = 32283070277760. Its totient is φ = 15063021697920.

The previous prime is 23403353044507. The next prime is 23403353044523. The reversal of 23403353044521 is 12544035330432.

It is not a de Polignac number, because 23403353044521 - 2⁹ = 23403353044009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23403353044521.

It is not an unprimeable number, because it can be changed into a prime (23403353044523) 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, 9669820 + ... + 11845341.

It is an arithmetic number, because the mean of its divisors is an integer number (2017691892360).

Almost surely, 2^{23403353044521} is an apocalyptic number.

It is an amenable number.

23403353044521 is a deficient number, since it is larger than the sum of its proper divisors (8879717233239).

23403353044521 is a wasteful number, since it uses less digits than its factorization.

23403353044521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21527696.

The product of its (nonzero) digits is 518400, while the sum is 39.

Adding to 23403353044521 its reverse (12544035330432), we get a palindrome (35947388374953).

The spelling of 23403353044521 in words is "twenty-three trillion, four hundred three billion, three hundred fifty-three million, forty-four thousand, five hundred twenty-one".