20163148009 has 9 divisors (see below), whose sum is σ = 20320702213. Its totient is φ = 20006809312.

The previous prime is 20163148001. The next prime is 20163148021. The reversal of 20163148009 is 90084136102.

The square root of 20163148009 is 141997.

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 4978008025 + 15185139984 = 70555^2 + 123228^2 .

It is not a de Polignac number, because 20163148009 - 2³ = 20163148001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20163148001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21157077 + ... + 21158029.

Almost surely, 2^20163148009 is an apocalyptic number.

20163148009 is the 141997-th square number.

20163148009 is the 70999-th centered octagonal number.

It is an amenable number.

20163148009 is a deficient number, since it is larger than the sum of its proper divisors (157554204).

20163148009 is an frugal number, since it uses more digits than its factorization.

20163148009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 20163148009 in words is "twenty billion, one hundred sixty-three million, one hundred forty-eight thousand, nine".