23556430357 has 2 divisors, whose sum is σ = 23556430358. Its totient is φ = 23556430356.

The previous prime is 23556430343. The next prime is 23556430361. The reversal of 23556430357 is 75303465532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23556417361 + 12996 = 153481^2 + 114^2 .

It is a cyclic number.

It is not a de Polignac number, because 23556430357 - 2¹¹ = 23556428309 is a prime.

It is a super-2 number, since 2×23556430357² (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 (23556430057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11778215178 + 11778215179.

It is an arithmetic number, because the mean of its divisors is an integer number (11778215179).

Almost surely, 2^23556430357 is an apocalyptic number.

It is an amenable number.

23556430357 is a deficient number, since it is larger than the sum of its proper divisors (1).

23556430357 is an equidigital number, since it uses as much as digits as its factorization.

23556430357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134000, while the sum is 43.

Adding to 23556430357 its reverse (75303465532), we get a palindrome (98859895889).

The spelling of 23556430357 in words is "twenty-three billion, five hundred fifty-six million, four hundred thirty thousand, three hundred fifty-seven".