20222397 has 24 divisors (see below), whose sum is σ = 31615584. Its totient is φ = 12381984.

The previous prime is 20222383. The next prime is 20222407. The reversal of 20222397 is 79322202.

It is not a de Polignac number, because 20222397 - 2¹¹ = 20220349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20222397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35638 + ... + 36200.

It is an arithmetic number, because the mean of its divisors is an integer number (1317316).

Almost surely, 2^20222397 is an apocalyptic number.

It is an amenable number.

20222397 is a deficient number, since it is larger than the sum of its proper divisors (11393187).

20222397 is a wasteful number, since it uses less digits than its factorization.

20222397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889 (or 886 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 20222397 is about 4496.9319541216. The cubic root of 20222397 is about 272.4441857463. Note that the first 3 decimals are identical.

Adding to 20222397 its reverse (79322202), we get a palindrome (99544599).

The spelling of 20222397 in words is "twenty million, two hundred twenty-two thousand, three hundred ninety-seven".