23420440243 has 8 divisors (see below), whose sum is σ = 24007693248. Its totient is φ = 22835123304.

The previous prime is 23420440213. The next prime is 23420440271. The reversal of 23420440243 is 34204402432.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23420440243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23420440213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459505 + ... + 507922.

It is an arithmetic number, because the mean of its divisors is an integer number (3000961656).

Almost surely, 2^23420440243 is an apocalyptic number.

23420440243 is a deficient number, since it is larger than the sum of its proper divisors (587253005).

23420440243 is an equidigital number, since it uses as much as digits as its factorization.

23420440243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968033.

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 23420440243 its reverse (34204402432), we get a palindrome (57624842675).

It can be divided in two parts, 2 and 3420440243, that multiplied together give a palindrome (6840880486).

The spelling of 23420440243 in words is "twenty-three billion, four hundred twenty million, four hundred forty thousand, two hundred forty-three".