20106239 has 8 divisors (see below), whose sum is σ = 20563200. Its totient is φ = 19652256.

The previous prime is 20106227. The next prime is 20106253. The reversal of 20106239 is 93260102.

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 20106239 - 2¹⁶ = 20040703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20106139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17954 + ... + 19040.

It is an arithmetic number, because the mean of its divisors is an integer number (2570400).

Almost surely, 2^20106239 is an apocalyptic number.

20106239 is a deficient number, since it is larger than the sum of its proper divisors (456961).

20106239 is a wasteful number, since it uses less digits than its factorization.

20106239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 20106239 is about 4483.9981043707. The cubic root of 20106239 is about 271.9215414928.

The spelling of 20106239 in words is "twenty million, one hundred six thousand, two hundred thirty-nine".