20898853 has 4 divisors (see below), whose sum is σ = 21037408. Its totient is φ = 20760300.

The previous prime is 20898851. The next prime is 20898863. The reversal of 20898853 is 35889802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20898853 - 2¹ = 20898851 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 (20898851) 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, 69051 + ... + 69352.

It is an arithmetic number, because the mean of its divisors is an integer number (5259352).

Almost surely, 2^20898853 is an apocalyptic number.

It is an amenable number.

20898853 is a deficient number, since it is larger than the sum of its proper divisors (138555).

20898853 is a wasteful number, since it uses less digits than its factorization.

20898853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138554.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 20898853 is about 4571.5263315440. The cubic root of 20898853 is about 275.4487571072.

The spelling of 20898853 in words is "twenty million, eight hundred ninety-eight thousand, eight hundred fifty-three".