20967397 has 8 divisors (see below), whose sum is σ = 22908672. Its totient is φ = 19032000.

The previous prime is 20967391. The next prime is 20967413. The reversal of 20967397 is 79376902.

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 20967397 - 2³ = 20967389 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 (20967391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9772 + ... + 11722.

It is an arithmetic number, because the mean of its divisors is an integer number (2863584).

Almost surely, 2^20967397 is an apocalyptic number.

It is an amenable number.

20967397 is a deficient number, since it is larger than the sum of its proper divisors (1941275).

20967397 is a wasteful number, since it uses less digits than its factorization.

20967397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939.

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 20967397 is about 4579.0170342553. The cubic root of 20967397 is about 275.7495671706.

The spelling of 20967397 in words is "twenty million, nine hundred sixty-seven thousand, three hundred ninety-seven".