23205147451 has 4 divisors (see below), whose sum is σ = 23207690752. Its totient is φ = 23202604152.

The previous prime is 23205147443. The next prime is 23205147457. The reversal of 23205147451 is 15474150232.

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

It is a cyclic number.

It is not a de Polignac number, because 23205147451 - 2³ = 23205147443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23205147457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1257915 + ... + 1276228.

It is an arithmetic number, because the mean of its divisors is an integer number (5801922688).

Almost surely, 2^23205147451 is an apocalyptic number.

23205147451 is a deficient number, since it is larger than the sum of its proper divisors (2543301).

23205147451 is an equidigital number, since it uses as much as digits as its factorization.

23205147451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543300.

The product of its (nonzero) digits is 33600, while the sum is 34.

Adding to 23205147451 its reverse (15474150232), we get a palindrome (38679297683).

The spelling of 23205147451 in words is "twenty-three billion, two hundred five million, one hundred forty-seven thousand, four hundred fifty-one".