20654197 has 16 divisors (see below), whose sum is σ = 22521600. Its totient is φ = 18878400.

The previous prime is 20654191. The next prime is 20654203. The reversal of 20654197 is 79145602.

It is an interprime number because it is at equal distance from previous prime (20654191) and next prime (20654203).

It is not a de Polignac number, because 20654197 - 2¹⁹ = 20129909 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 (20654191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90079 + ... + 90307.

It is an arithmetic number, because the mean of its divisors is an integer number (1407600).

Almost surely, 2^20654197 is an apocalyptic number.

It is an amenable number.

20654197 is a deficient number, since it is larger than the sum of its proper divisors (1867403).

20654197 is a wasteful number, since it uses less digits than its factorization.

20654197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 20654197 is about 4544.6888782402. The cubic root of 20654197 is about 274.3696725840.

Adding to 20654197 its reverse (79145602), we get a palindrome (99799799).

The spelling of 20654197 in words is "twenty million, six hundred fifty-four thousand, one hundred ninety-seven".