20982243 has 8 divisors (see below), whose sum is σ = 28024000. Its totient is φ = 13964328.

The previous prime is 20982239. The next prime is 20982253. The reversal of 20982243 is 34228902.

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

It is not a de Polignac number, because 20982243 - 2² = 20982239 is a prime.

It is a super-2 number, since 2×20982243² = 880509042622098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20982243.

It is not an unprimeable number, because it can be changed into a prime (20982253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3793 + ... + 7506.

It is an arithmetic number, because the mean of its divisors is an integer number (3503000).

Almost surely, 2^20982243 is an apocalyptic number.

20982243 is a deficient number, since it is larger than the sum of its proper divisors (7041757).

20982243 is a wasteful number, since it uses less digits than its factorization.

20982243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11921.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20982243 is about 4580.6378376816. The cubic root of 20982243 is about 275.8146334614.

The spelling of 20982243 in words is "twenty million, nine hundred eighty-two thousand, two hundred forty-three".