20732197 has 8 divisors (see below), whose sum is σ = 22018176. Its totient is φ = 19453632.

The previous prime is 20732171. The next prime is 20732221. The reversal of 20732197 is 79123702.

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 20732197 - 2¹⁹ = 20207909 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 (20732597) 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, 4578 + ... + 7900.

It is an arithmetic number, because the mean of its divisors is an integer number (2752272).

Almost surely, 2^20732197 is an apocalyptic number.

It is an amenable number.

20732197 is a deficient number, since it is larger than the sum of its proper divisors (1285979).

20732197 is a wasteful number, since it uses less digits than its factorization.

20732197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 20732197 is about 4553.2622371219. The cubic root of 20732197 is about 274.7146218608.

Adding to 20732197 its reverse (79123702), we get a palindrome (99855899).

The spelling of 20732197 in words is "twenty million, seven hundred thirty-two thousand, one hundred ninety-seven".