20835417 has 4 divisors (see below), whose sum is σ = 27780560. Its totient is φ = 13890276.

The previous prime is 20835389. The next prime is 20835431. The reversal of 20835417 is 71453802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20835417 - 2⁷ = 20835289 is a prime.

It is a super-2 number, since 2×20835417² = 868229203127778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20835467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3472567 + ... + 3472572.

It is an arithmetic number, because the mean of its divisors is an integer number (6945140).

Almost surely, 2^20835417 is an apocalyptic number.

It is an amenable number.

20835417 is a deficient number, since it is larger than the sum of its proper divisors (6945143).

20835417 is an equidigital number, since it uses as much as digits as its factorization.

20835417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6945142.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20835417 is about 4564.5828944165. The cubic root of 20835417 is about 275.1697772564.

The spelling of 20835417 in words is "twenty million, eight hundred thirty-five thousand, four hundred seventeen".