20187853 has 12 divisors (see below), whose sum is σ = 23885280. Its totient is φ = 17008152.

The previous prime is 20187833. The next prime is 20187887. The reversal of 20187853 is 35878102.

It is not a de Polignac number, because 20187853 - 2⁵ = 20187821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20187803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 601 + ... + 6382.

It is an arithmetic number, because the mean of its divisors is an integer number (1990440).

Almost surely, 2^20187853 is an apocalyptic number.

It is an amenable number.

20187853 is a deficient number, since it is larger than the sum of its proper divisors (3697427).

20187853 is an equidigital number, since it uses as much as digits as its factorization.

20187853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7056 (or 7049 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 20187853 is about 4493.0894716219. The cubic root of 20187853 is about 272.2889671561.

The spelling of 20187853 in words is "twenty million, one hundred eighty-seven thousand, eight hundred fifty-three".