20830948569 has 12 divisors (see below), whose sum is σ = 30098008356. Its totient is φ = 13883209632.

The previous prime is 20830948561. The next prime is 20830948571. The reversal of 20830948569 is 96584903802.

20830948569 is a `hidden beast` number, since 2 + 0 + 8 + 30 + 9 + 48 + 569 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19796490000 + 1034458569 = 140700^2 + 32163^2 .

It is not a de Polignac number, because 20830948569 - 2³ = 20830948561 is a prime.

It is a super-2 number, since 2×20830948569² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20830948561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 308362 + ... + 369795.

It is an arithmetic number, because the mean of its divisors is an integer number (2508167363).

Almost surely, 2^20830948569 is an apocalyptic number.

It is an amenable number.

20830948569 is a deficient number, since it is larger than the sum of its proper divisors (9267059787).

20830948569 is a wasteful number, since it uses less digits than its factorization.

20830948569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681576 (or 681573 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 20830948569 in words is "twenty billion, eight hundred thirty million, nine hundred forty-eight thousand, five hundred sixty-nine".