20985483 has 4 divisors (see below), whose sum is σ = 27980648. Its totient is φ = 13990320.

The previous prime is 20985479. The next prime is 20985487. The reversal of 20985483 is 38458902.

It is a happy number.

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 (20985479) and next prime (20985487).

It is not a de Polignac number, because 20985483 - 2² = 20985479 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20985487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3497578 + ... + 3497583.

It is an arithmetic number, because the mean of its divisors is an integer number (6995162).

Almost surely, 2^20985483 is an apocalyptic number.

20985483 is a deficient number, since it is larger than the sum of its proper divisors (6995165).

20985483 is an equidigital number, since it uses as much as digits as its factorization.

20985483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6995164.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 20985483 is about 4580.9914865671. The cubic root of 20985483 is about 275.8288294877.

The spelling of 20985483 in words is "twenty million, nine hundred eighty-five thousand, four hundred eighty-three".