21304677258601 has 9 divisors (see below), whose sum is σ = 23417593621303. Its totient is φ = 19367842259920.

The previous prime is 21304677258517. The next prime is 21304677258719. The reversal of 21304677258601 is 10685277640312.

The square root of 21304677258601 is 4615699.

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

It can be written as a sum of positive squares in only one way, i.e., 18107161073001 + 3197516185600 = 4255251^2 + 1788160^2 .

It is not a de Polignac number, because 21304677258601 - 2⁹ = 21304677258089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21304677258101) 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, 50562885 + ... + 50982493.

Almost surely, 2^{21304677258601} is an apocalyptic number.

21304677258601 is the 4615699-th square number.

21304677258601 is the 2307850-th centered octagonal number.

It is an amenable number.

21304677258601 is a deficient number, since it is larger than the sum of its proper divisors (2112916362702).

21304677258601 is an frugal number, since it uses more digits than its factorization.

21304677258601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839240 (or 419620 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 21304677258601 in words is "twenty-one trillion, three hundred four billion, six hundred seventy-seven million, two hundred fifty-eight thousand, six hundred one".