20399183 has 8 divisors (see below), whose sum is σ = 24327168. Its totient is φ = 16724664.

The previous prime is 20399177. The next prime is 20399213. The reversal of 20399183 is 38199302.

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

It is a cyclic number.

It is not a de Polignac number, because 20399183 - 2¹⁴ = 20382799 is a prime.

It is a super-2 number, since 2×20399183² = 832253334134978, 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 (20395183) 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 7 ways as a sum of consecutive naturals, for example, 63191 + ... + 63512.

It is an arithmetic number, because the mean of its divisors is an integer number (3040896).

Almost surely, 2^20399183 is an apocalyptic number.

20399183 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20399183 is a deficient number, since it is larger than the sum of its proper divisors (3927985).

20399183 is a wasteful number, since it uses less digits than its factorization.

20399183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126733.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 20399183 is about 4516.5454719287. The cubic root of 20399183 is about 273.2357939035.

The spelling of 20399183 in words is "twenty million, three hundred ninety-nine thousand, one hundred eighty-three".