23445453121421 has 16 divisors (see below), whose sum is σ = 24296542256448. Its totient is φ = 22610040835200.

The previous prime is 23445453121417. The next prime is 23445453121439. The reversal of 23445453121421 is 12412135454432.

It is a cyclic number.

It is not a de Polignac number, because 23445453121421 - 2² = 23445453121417 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 (23445453121021) 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, 9454160 + ... + 11673561.

It is an arithmetic number, because the mean of its divisors is an integer number (1518533891028).

Almost surely, 2^{23445453121421} is an apocalyptic number.

It is an amenable number.

23445453121421 is a deficient number, since it is larger than the sum of its proper divisors (851089135027).

23445453121421 is a wasteful number, since it uses less digits than its factorization.

23445453121421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21128092.

The product of its digits is 460800, while the sum is 41.

Adding to 23445453121421 its reverse (12412135454432), we get a palindrome (35857588575853).

The spelling of 23445453121421 in words is "twenty-three trillion, four hundred forty-five billion, four hundred fifty-three million, one hundred twenty-one thousand, four hundred twenty-one".