20422442 has 4 divisors (see below), whose sum is σ = 30633666. Its totient is φ = 10211220.

The previous prime is 20422439. The next prime is 20422447. The reversal of 20422442 is 24422402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14753281 + 5669161 = 3841^2 + 2381^2 .

It is a super-2 number, since 2×20422442² = 834152274486728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20422447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105609 + ... + 5105612.

Almost surely, 2^20422442 is an apocalyptic number.

20422442 is a deficient number, since it is larger than the sum of its proper divisors (10211224).

20422442 is a wasteful number, since it uses less digits than its factorization.

20422442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10211223.

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 20422442 is about 4519.1196045248. The cubic root of 20422442 is about 273.3396016145.

Adding to 20422442 its reverse (24422402), we get a palindrome (44844844).

The spelling of 20422442 in words is "twenty million, four hundred twenty-two thousand, four hundred forty-two".