20220197 has 8 divisors (see below), whose sum is σ = 21390144. Its totient is φ = 19074528.

The previous prime is 20220173. The next prime is 20220217. The reversal of 20220197 is 79102202.

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 20220197 - 2⁶ = 20220133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220127) 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, 4343 + ... + 7700.

It is an arithmetic number, because the mean of its divisors is an integer number (2673768).

Almost surely, 2^20220197 is an apocalyptic number.

It is an amenable number.

20220197 is a deficient number, since it is larger than the sum of its proper divisors (1169947).

20220197 is a wasteful number, since it uses less digits than its factorization.

20220197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12139.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 20220197 is about 4496.6873362510. The cubic root of 20220197 is about 272.4343056293.

Adding to 20220197 its reverse (79102202), we get a palindrome (99322399).

The spelling of 20220197 in words is "twenty million, two hundred twenty thousand, one hundred ninety-seven".