20061606321 has 27 divisors (see below), whose sum is σ = 29962473177. Its totient is φ = 12934473480.

The previous prime is 20061606287. The next prime is 20061606329. The reversal of 20061606321 is 12360616002.

The square root of 20061606321 is 141639.

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

20061606321 is a `hidden beast` number, since 20 + 0 + 6 + 1 + 6 + 0 + 632 + 1 = 666.

It is not a de Polignac number, because 20061606321 - 2⁷ = 20061606193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20061606329) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 13171666 + ... + 13173188.

Almost surely, 2^20061606321 is an apocalyptic number.

20061606321 is the 141639-th square number.

20061606321 is the 70820-th centered octagonal number.

It is an amenable number.

20061606321 is a deficient number, since it is larger than the sum of its proper divisors (9900866856).

20061606321 is an frugal number, since it uses more digits than its factorization.

20061606321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3114 (or 1557 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The spelling of 20061606321 in words is "twenty billion, sixty-one million, six hundred six thousand, three hundred twenty-one".