20682397 has 8 divisors (see below), whose sum is σ = 21192192. Its totient is φ = 20175600.

The previous prime is 20682373. The next prime is 20682407. The reversal of 20682397 is 79328602.

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 20682397 - 2¹¹ = 20680349 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 (20682367) 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, 19747 + ... + 20767.

It is an arithmetic number, because the mean of its divisors is an integer number (2649024).

Almost surely, 2^20682397 is an apocalyptic number.

It is an amenable number.

20682397 is a deficient number, since it is larger than the sum of its proper divisors (509795).

20682397 is a wasteful number, since it uses less digits than its factorization.

20682397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 20682397 is about 4547.7903425730. The cubic root of 20682397 is about 274.4944850878.

It can be divided in two parts, 2068 and 2397, that added together give a triangular number (4465 = T₉₄).

The spelling of 20682397 in words is "twenty million, six hundred eighty-two thousand, three hundred ninety-seven".