20799197 has 4 divisors (see below), whose sum is σ = 20809920. Its totient is φ = 20788476.

The previous prime is 20799179. The next prime is 20799209. The reversal of 20799197 is 79199702.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20799197 - 2⁶ = 20799133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20799127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1547 + ... + 6632.

It is an arithmetic number, because the mean of its divisors is an integer number (5202480).

Almost surely, 2^20799197 is an apocalyptic number.

It is an amenable number.

20799197 is a deficient number, since it is larger than the sum of its proper divisors (10723).

20799197 is an equidigital number, since it uses as much as digits as its factorization.

20799197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10722.

The product of its (nonzero) digits is 71442, while the sum is 44.

The square root of 20799197 is about 4560.6136648482. The cubic root of 20799197 is about 275.0102343299.

The spelling of 20799197 in words is "twenty million, seven hundred ninety-nine thousand, one hundred ninety-seven".