19820853 has 12 divisors (see below), whose sum is σ = 30832620. Its totient is φ = 12197376.

The previous prime is 19820851. The next prime is 19820869. The reversal of 19820853 is 35802891.

It can be written as a sum of positive squares in 2 ways, for example, as 9108324 + 10712529 = 3018^2 + 3273^2 .

It is not a de Polignac number, because 19820853 - 2¹ = 19820851 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19820851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84588 + ... + 84821.

It is an arithmetic number, because the mean of its divisors is an integer number (2569385).

Almost surely, 2^19820853 is an apocalyptic number.

19820853 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19820853 is a deficient number, since it is larger than the sum of its proper divisors (11011767).

19820853 is a wasteful number, since it uses less digits than its factorization.

19820853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169428 (or 169425 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 19820853 is about 4452.0616572550. The cubic root of 19820853 is about 270.6288633804.

The spelling of 19820853 in words is "nineteen million, eight hundred twenty thousand, eight hundred fifty-three".