23440420321 has 16 divisors (see below), whose sum is σ = 24358371840. Its totient is φ = 22533096960.

The previous prime is 23440420319. The next prime is 23440420387. The reversal of 23440420321 is 12302404432.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 23440420321 - 2¹ = 23440420319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23440429321) 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, 2939686 + ... + 2947648.

It is an arithmetic number, because the mean of its divisors is an integer number (1522398240).

Almost surely, 2^23440420321 is an apocalyptic number.

It is an amenable number.

23440420321 is a deficient number, since it is larger than the sum of its proper divisors (917951519).

23440420321 is a wasteful number, since it uses less digits than its factorization.

23440420321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8616.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 23440420321 its reverse (12302404432), we get a palindrome (35742824753).

The spelling of 23440420321 in words is "twenty-three billion, four hundred forty million, four hundred twenty thousand, three hundred twenty-one".