20673197 has 4 divisors (see below), whose sum is σ = 21761280. Its totient is φ = 19585116.

The previous prime is 20673193. The next prime is 20673199. The reversal of 20673197 is 79137602.

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 an emirpimes, since its reverse is a distinct semiprime: 79137602 = 2 ⋅39568801.

It is a cyclic number.

It is not a de Polignac number, because 20673197 - 2² = 20673193 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 (20673193) 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, 544013 + ... + 544050.

It is an arithmetic number, because the mean of its divisors is an integer number (5440320).

Almost surely, 2^20673197 is an apocalyptic number.

It is an amenable number.

20673197 is a deficient number, since it is larger than the sum of its proper divisors (1088083).

20673197 is a wasteful number, since it uses less digits than its factorization.

20673197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088082.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 20673197 is about 4546.7787498404. The cubic root of 20673197 is about 274.4537785907.

The spelling of 20673197 in words is "twenty million, six hundred seventy-three thousand, one hundred ninety-seven".