20798417 has 8 divisors (see below), whose sum is σ = 21748416. Its totient is φ = 19852272.

The previous prime is 20798413. The next prime is 20798443. The reversal of 20798417 is 71489702.

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 20798417 - 2² = 20798413 is a prime.

It is a super-3 number, since 3×20798417³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20798411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20363 + ... + 21359.

It is an arithmetic number, because the mean of its divisors is an integer number (2718552).

Almost surely, 2^20798417 is an apocalyptic number.

It is an amenable number.

20798417 is a deficient number, since it is larger than the sum of its proper divisors (949999).

20798417 is an equidigital number, since it uses as much as digits as its factorization.

20798417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 20798417 is about 4560.5281492389. The cubic root of 20798417 is about 275.0067965262.

The spelling of 20798417 in words is "twenty million, seven hundred ninety-eight thousand, four hundred seventeen".