20717419 has 2 divisors, whose sum is σ = 20717420. Its totient is φ = 20717418.

The previous prime is 20717413. The next prime is 20717449. The reversal of 20717419 is 91471702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20717419 - 2⁵ = 20717387 is a prime.

It is a super-2 number, since 2×20717419² = 858422900043122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20717413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10358709 + 10358710.

It is an arithmetic number, because the mean of its divisors is an integer number (10358710).

Almost surely, 2^20717419 is an apocalyptic number.

20717419 is a deficient number, since it is larger than the sum of its proper divisors (1).

20717419 is an equidigital number, since it uses as much as digits as its factorization.

20717419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 20717419 is about 4551.6391552934. The cubic root of 20717419 is about 274.6493337543.

The spelling of 20717419 in words is "twenty million, seven hundred seventeen thousand, four hundred nineteen".