20850247 has 8 divisors (see below), whose sum is σ = 22981392. Its totient is φ = 18758400.

The previous prime is 20850241. The next prime is 20850251. The reversal of 20850247 is 74205802.

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 20850247 - 2¹¹ = 20848199 is a prime.

It is a super-2 number, since 2×20850247² = 869465599922018, 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 (20850241) 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, 8704 + ... + 10837.

It is an arithmetic number, because the mean of its divisors is an integer number (2872674).

Almost surely, 2^20850247 is an apocalyptic number.

20850247 is a deficient number, since it is larger than the sum of its proper divisors (2131145).

20850247 is a wasteful number, since it uses less digits than its factorization.

20850247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19649.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 20850247 is about 4566.2070693301. The cubic root of 20850247 is about 275.2350475282.

The spelling of 20850247 in words is "twenty million, eight hundred fifty thousand, two hundred forty-seven".