20353239 has 6 divisors (see below), whose sum is σ = 29399136. Its totient is φ = 13568820.

The previous prime is 20353213. The next prime is 20353241. The reversal of 20353239 is 93235302.

It is not a de Polignac number, because 20353239 - 2¹⁶ = 20287703 is a prime.

It is a super-2 number, since 2×20353239² = 828508675582242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20353259) 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 5 ways as a sum of consecutive naturals, for example, 1130727 + ... + 1130744.

It is an arithmetic number, because the mean of its divisors is an integer number (4899856).

Almost surely, 2^20353239 is an apocalyptic number.

20353239 is a deficient number, since it is larger than the sum of its proper divisors (9045897).

20353239 is a wasteful number, since it uses less digits than its factorization.

20353239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261477 (or 2261474 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 27.

The square root of 20353239 is about 4511.4564167240. The cubic root of 20353239 is about 273.0305082035.

The spelling of 20353239 in words is "twenty million, three hundred fifty-three thousand, two hundred thirty-nine".