23154020243 has 4 divisors (see below), whose sum is σ = 23164146720. Its totient is φ = 23143893768.

The previous prime is 23154020237. The next prime is 23154020251. The reversal of 23154020243 is 34202045132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23154020243 is a prime.

It is a super-2 number, since 2×23154020243² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23154020233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5059808 + ... + 5064381.

It is an arithmetic number, because the mean of its divisors is an integer number (5791036680).

Almost surely, 2^23154020243 is an apocalyptic number.

23154020243 is a deficient number, since it is larger than the sum of its proper divisors (10126477).

23154020243 is a wasteful number, since it uses less digits than its factorization.

23154020243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10126476.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 23154020243 its reverse (34202045132), we get a palindrome (57356065375).

The spelling of 23154020243 in words is "twenty-three billion, one hundred fifty-four million, twenty thousand, two hundred forty-three".