20683485387 has 24 divisors (see below), whose sum is σ = 31816459584. Its totient is φ = 12902840064.

The previous prime is 20683485359. The next prime is 20683485397. The reversal of 20683485387 is 78358438602.

20683485387 is a `hidden beast` number, since 2 + 0 + 6 + 83 + 485 + 3 + 87 = 666.

It is not a de Polignac number, because 20683485387 - 2¹⁹ = 20682961099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20683485397) 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 23 ways as a sum of consecutive naturals, for example, 364243 + ... + 417180.

It is an arithmetic number, because the mean of its divisors is an integer number (1325685816).

Almost surely, 2^20683485387 is an apocalyptic number.

20683485387 is a deficient number, since it is larger than the sum of its proper divisors (11132974197).

20683485387 is a wasteful number, since it uses less digits than its factorization.

20683485387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781619 (or 781616 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 54.

The spelling of 20683485387 in words is "twenty billion, six hundred eighty-three million, four hundred eighty-five thousand, three hundred eighty-seven".