23440001621423 has 4 divisors (see below), whose sum is σ = 23789852391960. Its totient is φ = 23090150850888.

The previous prime is 23440001621419. The next prime is 23440001621431. The reversal of 23440001621423 is 32412610004432.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23440001621423 - 2² = 23440001621419 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 23440001621423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23440001621123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174925385168 + ... + 174925385301.

It is an arithmetic number, because the mean of its divisors is an integer number (5947463097990).

Almost surely, 2^{23440001621423} is an apocalyptic number.

23440001621423 is a deficient number, since it is larger than the sum of its proper divisors (349850770537).

23440001621423 is an equidigital number, since it uses as much as digits as its factorization.

23440001621423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349850770536.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 23440001621423 its reverse (32412610004432), we get a palindrome (55852611625855).

The spelling of 23440001621423 in words is "twenty-three trillion, four hundred forty billion, one million, six hundred twenty-one thousand, four hundred twenty-three".