23489645809 has 16 divisors (see below), whose sum is σ = 27132101248. Its totient is φ = 19919043072.

The previous prime is 23489645789. The next prime is 23489645813. The reversal of 23489645809 is 90854698432.

It is a cyclic number.

It is not a de Polignac number, because 23489645809 - 2¹¹ = 23489643761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23489643809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2628022 + ... + 2636944.

It is an arithmetic number, because the mean of its divisors is an integer number (1695756328).

Almost surely, 2^23489645809 is an apocalyptic number.

It is an amenable number.

23489645809 is a deficient number, since it is larger than the sum of its proper divisors (3642455439).

23489645809 is an equidigital number, since it uses as much as digits as its factorization.

23489645809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12904.

The product of its (nonzero) digits is 14929920, while the sum is 58.

The spelling of 23489645809 in words is "twenty-three billion, four hundred eighty-nine million, six hundred forty-five thousand, eight hundred nine".