23440415521 has 8 divisors (see below), whose sum is σ = 23547333888. Its totient is φ = 23333700000.

The previous prime is 23440415519. The next prime is 23440415627. The reversal of 23440415521 is 12551404432.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23440415521 - 2¹ = 23440415519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23440415021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183381 + ... + 283741.

It is an arithmetic number, because the mean of its divisors is an integer number (2943416736).

Almost surely, 2^23440415521 is an apocalyptic number.

It is an amenable number.

23440415521 is a deficient number, since it is larger than the sum of its proper divisors (106918367).

23440415521 is a wasteful number, since it uses less digits than its factorization.

23440415521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101423.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 23440415521 its reverse (12551404432), we get a palindrome (35991819953).

The spelling of 23440415521 in words is "twenty-three billion, four hundred forty million, four hundred fifteen thousand, five hundred twenty-one".