23356689989 has 4 divisors (see below), whose sum is σ = 23357073324. Its totient is φ = 23356306656.

The previous prime is 23356689953. The next prime is 23356690001. The reversal of 23356689989 is 98998665332.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12296592100 + 11060097889 = 110890^2 + 105167^2 .

It is a cyclic number.

It is not a de Polignac number, because 23356689989 - 2¹² = 23356685893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23356689689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77672 + ... + 229665.

It is an arithmetic number, because the mean of its divisors is an integer number (5839268331).

Almost surely, 2^23356689989 is an apocalyptic number.

It is an amenable number.

23356689989 is a deficient number, since it is larger than the sum of its proper divisors (383335).

23356689989 is an equidigital number, since it uses as much as digits as its factorization.

23356689989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383334.

The product of its digits is 151165440, while the sum is 68.

The spelling of 23356689989 in words is "twenty-three billion, three hundred fifty-six million, six hundred eighty-nine thousand, nine hundred eighty-nine".