20983113 has 12 divisors (see below), whose sum is σ = 30420468. Its totient is φ = 13937280.

The previous prime is 20983099. The next prime is 20983121. The reversal of 20983113 is 31138902.

It can be written as a sum of positive squares in 2 ways, for example, as 18558864 + 2424249 = 4308^2 + 1557^2 .

It is not a de Polignac number, because 20983113 - 2¹⁰ = 20982089 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20983133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1620 + ... + 6677.

It is an arithmetic number, because the mean of its divisors is an integer number (2535039).

Almost surely, 2^20983113 is an apocalyptic number.

It is an amenable number.

20983113 is a deficient number, since it is larger than the sum of its proper divisors (9437355).

20983113 is a wasteful number, since it uses less digits than its factorization.

20983113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8584 (or 8581 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 20983113 is about 4580.7328016377. The cubic root of 20983113 is about 275.8184455009.

The spelling of 20983113 in words is "twenty million, nine hundred eighty-three thousand, one hundred thirteen".