20672197 has 8 divisors (see below), whose sum is σ = 25442816. Its totient is φ = 16355952.

The previous prime is 20672131. The next prime is 20672227. The reversal of 20672197 is 79127602.

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 20672197 - 2²³ = 12283589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670197) 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, 113493 + ... + 113674.

It is an arithmetic number, because the mean of its divisors is an integer number (3180352).

Almost surely, 2^20672197 is an apocalyptic number.

It is an amenable number.

20672197 is a deficient number, since it is larger than the sum of its proper divisors (4770619).

20672197 is a wasteful number, since it uses less digits than its factorization.

20672197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227187.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 20672197 is about 4546.6687805469. The cubic root of 20672197 is about 274.4493532438.

Adding to 20672197 its reverse (79127602), we get a palindrome (99799799).

The spelling of 20672197 in words is "twenty million, six hundred seventy-two thousand, one hundred ninety-seven".