21060633205 has 8 divisors (see below), whose sum is σ = 25496413272. Its totient is φ = 16699404288.

The previous prime is 21060633157. The next prime is 21060633229. The reversal of 21060633205 is 50233606012.

It can be written as a sum of positive squares in 4 ways, for example, as 2714201604 + 18346431601 = 52098^2 + 135449^2 .

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 21060633205 - 2¹¹ = 21060631157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18637164 + ... + 18638293.

It is an arithmetic number, because the mean of its divisors is an integer number (3187051659).

Almost surely, 2^21060633205 is an apocalyptic number.

It is an amenable number.

21060633205 is a deficient number, since it is larger than the sum of its proper divisors (4435780067).

21060633205 is a wasteful number, since it uses less digits than its factorization.

21060633205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37275575.

The product of its (nonzero) digits is 6480, while the sum is 28.

The spelling of 21060633205 in words is "twenty-one billion, sixty million, six hundred thirty-three thousand, two hundred five".