23340440421 has 24 divisors (see below), whose sum is σ = 33926854104. Its totient is φ = 15462236160.

The previous prime is 23340440323. The next prime is 23340440441. The reversal of 23340440421 is 12404404332.

It is a happy number.

23340440421 is a `hidden beast` number, since 233 + 4 + 0 + 4 + 4 + 0 + 421 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 18718344225 + 4622096196 = 136815^2 + 67986^2 .

It is not a de Polignac number, because 23340440421 - 2¹³ = 23340432229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23340440441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1511781 + ... + 1527141.

It is an arithmetic number, because the mean of its divisors is an integer number (1413618921).

Almost surely, 2^23340440421 is an apocalyptic number.

It is an amenable number.

23340440421 is a deficient number, since it is larger than the sum of its proper divisors (10586413683).

23340440421 is a wasteful number, since it uses less digits than its factorization.

23340440421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16421 (or 16418 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 23340440421 its reverse (12404404332), we get a palindrome (35744844753).

It can be divided in two parts, 23340 and 440421, that added together give a square (463761 = 681²).

The spelling of 23340440421 in words is "twenty-three billion, three hundred forty million, four hundred forty thousand, four hundred twenty-one".