20794997 has 2 divisors, whose sum is σ = 20794998. Its totient is φ = 20794996.

The previous prime is 20794981. The next prime is 20795023. The reversal of 20794997 is 79949702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20666116 + 128881 = 4546^2 + 359^2 .

It is a cyclic number.

It is not a de Polignac number, because 20794997 - 2⁴ = 20794981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20794937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10397498 + 10397499.

It is an arithmetic number, because the mean of its divisors is an integer number (10397499).

Almost surely, 2^20794997 is an apocalyptic number.

It is an amenable number.

20794997 is a deficient number, since it is larger than the sum of its proper divisors (1).

20794997 is an equidigital number, since it uses as much as digits as its factorization.

20794997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 20794997 is about 4560.1531772518. The cubic root of 20794997 is about 274.9917220649.

The spelling of 20794997 in words is "twenty million, seven hundred ninety-four thousand, nine hundred ninety-seven".