20853395 has 4 divisors (see below), whose sum is σ = 25024080. Its totient is φ = 16682712.

The previous prime is 20853389. The next prime is 20853401. The reversal of 20853395 is 59335802.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20853389) and next prime (20853401).

It is a cyclic number.

It is not a de Polignac number, because 20853395 - 2¹⁶ = 20787859 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2085335 + ... + 2085344.

It is an arithmetic number, because the mean of its divisors is an integer number (6256020).

Almost surely, 2^20853395 is an apocalyptic number.

20853395 is a deficient number, since it is larger than the sum of its proper divisors (4170685).

20853395 is an equidigital number, since it uses as much as digits as its factorization.

20853395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170684.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 20853395 is about 4566.5517625447. The cubic root of 20853395 is about 275.2488986243.

The spelling of 20853395 in words is "twenty million, eight hundred fifty-three thousand, three hundred ninety-five".