20466197 has 4 divisors (see below), whose sum is σ = 20901696. Its totient is φ = 20030700.

The previous prime is 20466179. The next prime is 20466227. The reversal of 20466197 is 79166402.

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 a cyclic number.

It is not a de Polignac number, because 20466197 - 2⁸ = 20465941 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 (20466497) 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, 217679 + ... + 217772.

It is an arithmetic number, because the mean of its divisors is an integer number (5225424).

Almost surely, 2^20466197 is an apocalyptic number.

It is an amenable number.

20466197 is a deficient number, since it is larger than the sum of its proper divisors (435499).

20466197 is an equidigital number, since it uses as much as digits as its factorization.

20466197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435498.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 20466197 is about 4523.9581120961. The cubic root of 20466197 is about 273.5346720346.

The spelling of 20466197 in words is "twenty million, four hundred sixty-six thousand, one hundred ninety-seven".