20322397 has 8 divisors (see below), whose sum is σ = 20736576. Its totient is φ = 19912032.

The previous prime is 20322383. The next prime is 20322427. The reversal of 20322397 is 79322302.

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 20322397 - 2¹⁹ = 19798109 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 (20322307) 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, 11358 + ... + 13024.

It is an arithmetic number, because the mean of its divisors is an integer number (2592072).

Almost surely, 2^20322397 is an apocalyptic number.

It is an amenable number.

20322397 is a deficient number, since it is larger than the sum of its proper divisors (414179).

20322397 is a wasteful number, since it uses less digits than its factorization.

20322397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 20322397 is about 4508.0369341877. The cubic root of 20322397 is about 272.8925274793.

Adding to 20322397 its reverse (79322302), we get a palindrome (99644699).

The spelling of 20322397 in words is "twenty million, three hundred twenty-two thousand, three hundred ninety-seven".