23205147457 has 2 divisors, whose sum is σ = 23205147458. Its totient is φ = 23205147456.

The previous prime is 23205147443. The next prime is 23205147481. The reversal of 23205147457 is 75474150232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21537323536 + 1667823921 = 146756^2 + 40839^2 .

It is a cyclic number.

It is not a de Polignac number, because 23205147457 - 2¹¹ = 23205145409 is a prime.

It is a super-2 number, since 2×23205147457² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23205147257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11602573728 + 11602573729.

It is an arithmetic number, because the mean of its divisors is an integer number (11602573729).

Almost surely, 2^23205147457 is an apocalyptic number.

It is an amenable number.

23205147457 is a deficient number, since it is larger than the sum of its proper divisors (1).

23205147457 is an equidigital number, since it uses as much as digits as its factorization.

23205147457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 235200, while the sum is 40.

Adding to 23205147457 its reverse (75474150232), we get a palindrome (98679297689).

The spelling of 23205147457 in words is "twenty-three billion, two hundred five million, one hundred forty-seven thousand, four hundred fifty-seven".