23407538689 has 4 divisors (see below), whose sum is σ = 23414328900. Its totient is φ = 23400748480.

The previous prime is 23407538677. The next prime is 23407538831. The reversal of 23407538689 is 98683570432.

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 2149898689 + 21257640000 = 46367^2 + 145800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23407538689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23407530689) 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, 3389932 + ... + 3396829.

It is an arithmetic number, because the mean of its divisors is an integer number (5853582225).

Almost surely, 2^23407538689 is an apocalyptic number.

It is an amenable number.

23407538689 is a deficient number, since it is larger than the sum of its proper divisors (6790211).

23407538689 is an equidigital number, since it uses as much as digits as its factorization.

23407538689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6790210.

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 23407538689 in words is "twenty-three billion, four hundred seven million, five hundred thirty-eight thousand, six hundred eighty-nine".