23587428042721 has 9 divisors (see below), whose sum is σ = 23609133108729. Its totient is φ = 23565742926336.

The previous prime is 23587428042583. The next prime is 23587428042779. The reversal of 23587428042721 is 12724082478532.

The square root of 23587428042721 is 4856689.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 5766534652321 + 17820893390400 = 2401361^2 + 4221480^2 .

It is not a de Polignac number, because 23587428042721 - 2¹⁵ = 23587428009953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23587428042421) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9096577201 + ... + 9096579793.

It is an arithmetic number, because the mean of its divisors is an integer number (2623237012081).

Almost surely, 2^{23587428042721} is an apocalyptic number.

23587428042721 is the 4856689-th square number.

23587428042721 is the 2428345-th centered octagonal number.

It is an amenable number.

23587428042721 is a deficient number, since it is larger than the sum of its proper divisors (21705066008).

23587428042721 is an frugal number, since it uses more digits than its factorization.

23587428042721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8932 (or 4466 counting only the distinct ones).

The product of its (nonzero) digits is 12042240, while the sum is 55.

The spelling of 23587428042721 in words is "twenty-three trillion, five hundred eighty-seven billion, four hundred twenty-eight million, forty-two thousand, seven hundred twenty-one".