20913183 has 12 divisors (see below), whose sum is σ = 30255160. Its totient is φ = 13920336.

The previous prime is 20913181. The next prime is 20913203. The reversal of 20913183 is 38131902.

It is not a de Polignac number, because 20913183 - 2¹ = 20913181 is a prime.

It is a super-2 number, since 2×20913183² = 874722446382978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20913181) 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, 6060 + ... + 8862.

Almost surely, 2^20913183 is an apocalyptic number.

20913183 is a deficient number, since it is larger than the sum of its proper divisors (9341977).

20913183 is a wasteful number, since it uses less digits than its factorization.

20913183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3638 (or 3635 counting only the distinct ones).

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

The square root of 20913183 is about 4573.0933731994. The cubic root of 20913183 is about 275.5116996183.

The spelling of 20913183 in words is "twenty million, nine hundred thirteen thousand, one hundred eighty-three".