23435166721 has 8 divisors (see below), whose sum is σ = 24268774824. Its totient is φ = 22616056320.

The previous prime is 23435166719. The next prime is 23435166731. The reversal of 23435166721 is 12766153432.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 675220225 + 22759946496 = 25985^2 + 150864^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23435166721 - 2¹ = 23435166719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23435166731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3621136 + ... + 3627601.

It is an arithmetic number, because the mean of its divisors is an integer number (3033596853).

Almost surely, 2^23435166721 is an apocalyptic number.

It is an amenable number.

23435166721 is a deficient number, since it is larger than the sum of its proper divisors (833608103).

23435166721 is an equidigital number, since it uses as much as digits as its factorization.

23435166721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7248851.

The product of its digits is 181440, while the sum is 40.

The spelling of 23435166721 in words is "twenty-three billion, four hundred thirty-five million, one hundred sixty-six thousand, seven hundred twenty-one".