20853319 has 2 divisors, whose sum is σ = 20853320. Its totient is φ = 20853318.

The previous prime is 20853299. The next prime is 20853361. The reversal of 20853319 is 91335802.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20853319 - 2²¹ = 18756167 is a prime.

It is a super-2 number, since 2×20853319² = 869721826631522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20853389) 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 as a sum of consecutive naturals, namely, 10426659 + 10426660.

It is an arithmetic number, because the mean of its divisors is an integer number (10426660).

Almost surely, 2^20853319 is an apocalyptic number.

20853319 is a deficient number, since it is larger than the sum of its proper divisors (1).

20853319 is an equidigital number, since it uses as much as digits as its factorization.

20853319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 20853319 is about 4566.5434411598. The cubic root of 20853319 is about 275.2485642433.

The spelling of 20853319 in words is "twenty million, eight hundred fifty-three thousand, three hundred nineteen".