24340140021 has 4 divisors (see below), whose sum is σ = 32453520032. Its totient is φ = 16226760012.

The previous prime is 24340139987. The next prime is 24340140049. The reversal of 24340140021 is 12004104342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 24340140021 - 2¹¹ = 24340137973 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 24340140021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24340140061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4056690001 + ... + 4056690006.

It is an arithmetic number, because the mean of its divisors is an integer number (8113380008).

Almost surely, 2^24340140021 is an apocalyptic number.

It is an amenable number.

24340140021 is a deficient number, since it is larger than the sum of its proper divisors (8113380011).

24340140021 is an equidigital number, since it uses as much as digits as its factorization.

24340140021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8113380010.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 24340140021 its reverse (12004104342), we get a palindrome (36344244363).

The spelling of 24340140021 in words is "twenty-four billion, three hundred forty million, one hundred forty thousand, twenty-one".