20853190 has 8 divisors (see below), whose sum is σ = 37535760. Its totient is φ = 8341272.

The previous prime is 20853187. The next prime is 20853193. The reversal of 20853190 is 9135802.

It is an interprime number because it is at equal distance from previous prime (20853187) and next prime (20853193).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×20853190⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20853193) 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 3 ways as a sum of consecutive naturals, for example, 1042650 + ... + 1042669.

It is an arithmetic number, because the mean of its divisors is an integer number (4691970).

Almost surely, 2^20853190 is an apocalyptic number.

20853190 is a deficient number, since it is larger than the sum of its proper divisors (16682570).

20853190 is a wasteful number, since it uses less digits than its factorization.

20853190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085326.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 20853190 is about 4566.5293166693. The cubic root of 20853190 is about 275.2479966735.

Adding to 20853190 its reverse (9135802), we get a palindrome (29988992).

The spelling of 20853190 in words is "twenty million, eight hundred fifty-three thousand, one hundred ninety".