23665220351 has 2 divisors, whose sum is σ = 23665220352. Its totient is φ = 23665220350.

The previous prime is 23665220303. The next prime is 23665220437. The reversal of 23665220351 is 15302256632.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23665220351 - 2⁶ = 23665220287 is a prime.

It is a super-2 number, since 2×23665220351² (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 (23665210351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11832610175 + 11832610176.

It is an arithmetic number, because the mean of its divisors is an integer number (11832610176).

Almost surely, 2^23665220351 is an apocalyptic number.

23665220351 is a deficient number, since it is larger than the sum of its proper divisors (1).

23665220351 is an equidigital number, since it uses as much as digits as its factorization.

23665220351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 23665220351 its reverse (15302256632), we get a palindrome (38967476983).

The spelling of 23665220351 in words is "twenty-three billion, six hundred sixty-five million, two hundred twenty thousand, three hundred fifty-one".