20422394 has 4 divisors (see below), whose sum is σ = 30633594. Its totient is φ = 10211196.

The previous prime is 20422357. The next prime is 20422421. The reversal of 20422394 is 49322402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49322402 = 2 ⋅24661201.

It can be written as a sum of positive squares in only one way, i.e., 20367169 + 55225 = 4513^2 + 235^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105597 + ... + 5105600.

Almost surely, 2^20422394 is an apocalyptic number.

20422394 is a deficient number, since it is larger than the sum of its proper divisors (10211200).

20422394 is a wasteful number, since it uses less digits than its factorization.

20422394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10211199.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20422394 is about 4519.1142937527. The cubic root of 20422394 is about 273.3393874659.

Adding to 20422394 its reverse (49322402), we get a palindrome (69744796).

The spelling of 20422394 in words is "twenty million, four hundred twenty-two thousand, three hundred ninety-four".