23440023534221 has 6 divisors (see below), whose sum is σ = 27266966152110. Its totient is φ = 20091448743576.

The previous prime is 23440023534167. The next prime is 23440023534259. The reversal of 23440023534221 is 12243532004432.

It can be written as a sum of positive squares in only one way, i.e., 17762220975625 + 5677802558596 = 4214525^2 + 2382814^2 .

It is not a de Polignac number, because 23440023534221 - 2¹⁴ = 23440023517837 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 (23440023534721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 239183913566 + ... + 239183913663.

It is an arithmetic number, because the mean of its divisors is an integer number (4544494358685).

Almost surely, 2^{23440023534221} is an apocalyptic number.

It is an amenable number.

23440023534221 is a deficient number, since it is larger than the sum of its proper divisors (3826942617889).

23440023534221 is an equidigital number, since it uses as much as digits as its factorization.

23440023534221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478367827243 (or 478367827236 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 23440023534221 its reverse (12243532004432), we get a palindrome (35683555538653).

The spelling of 23440023534221 in words is "twenty-three trillion, four hundred forty billion, twenty-three million, five hundred thirty-four thousand, two hundred twenty-one".