20552376321 has 45 divisors (see below), whose sum is σ = 32648758329. Its totient is φ = 12881846016.

The previous prime is 20552376301. The next prime is 20552376349. The reversal of 20552376321 is 12367325502.

The square root of 20552376321 is 143361.

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

20552376321 is a `hidden beast` number, since 2 + 0 + 552 + 3 + 76 + 32 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1342416321 + 19209960000 = 36639^2 + 138600^2 .

It is not a de Polignac number, because 20552376321 - 2¹⁹ = 20551852033 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20552376301) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 21933765 + ... + 21934701.

Almost surely, 2^20552376321 is an apocalyptic number.

20552376321 is the 143361-st square number.

20552376321 is the 71681-st centered octagonal number.

It is an amenable number.

20552376321 is a deficient number, since it is larger than the sum of its proper divisors (12096382008).

20552376321 is an frugal number, since it uses more digits than its factorization.

20552376321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920 (or 957 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

Multiplying 20552376321 by its sum of digits (36), we get a square (739885547556 = 860166²).

The spelling of 20552376321 in words is "twenty billion, five hundred fifty-two million, three hundred seventy-six thousand, three hundred twenty-one".