23545981829 has 2 divisors, whose sum is σ = 23545981830. Its totient is φ = 23545981828.

The previous prime is 23545981807. The next prime is 23545981847. The reversal of 23545981829 is 92818954532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19738845025 + 3807136804 = 140495^2 + 61702^2 .

It is a cyclic number.

It is not a de Polignac number, because 23545981829 - 2⁸ = 23545981573 is a prime.

It is a super-3 number, since 3×23545981829³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23545981859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11772990914 + 11772990915.

It is an arithmetic number, because the mean of its divisors is an integer number (11772990915).

Almost surely, 2^23545981829 is an apocalyptic number.

It is an amenable number.

23545981829 is a deficient number, since it is larger than the sum of its proper divisors (1).

23545981829 is an equidigital number, since it uses as much as digits as its factorization.

23545981829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6220800, while the sum is 56.

The spelling of 23545981829 in words is "twenty-three billion, five hundred forty-five million, nine hundred eighty-one thousand, eight hundred twenty-nine".