23403120511 has 2 divisors, whose sum is σ = 23403120512. Its totient is φ = 23403120510.

The previous prime is 23403120473. The next prime is 23403120529. The reversal of 23403120511 is 11502130432.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23403120511 - 2²³ = 23394731903 is a prime.

It is a super-2 number, since 2×23403120511² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23403120551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11701560255 + 11701560256.

It is an arithmetic number, because the mean of its divisors is an integer number (11701560256).

Almost surely, 2^23403120511 is an apocalyptic number.

23403120511 is a deficient number, since it is larger than the sum of its proper divisors (1).

23403120511 is an equidigital number, since it uses as much as digits as its factorization.

23403120511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 23403120511 its reverse (11502130432), we get a palindrome (34905250943).

The spelling of 23403120511 in words is "twenty-three billion, four hundred three million, one hundred twenty thousand, five hundred eleven".