20422186 has 8 divisors (see below), whose sum is σ = 30949380. Its totient is φ = 10105728.

The previous prime is 20422159. The next prime is 20422189. The reversal of 20422186 is 68122402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19088161 + 1334025 = 4369^2 + 1155^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20422186.

It is not an unprimeable number, because it can be changed into a prime (20422189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52441 + ... + 52828.

Almost surely, 2^20422186 is an apocalyptic number.

20422186 is a deficient number, since it is larger than the sum of its proper divisors (10527194).

20422186 is a wasteful number, since it uses less digits than its factorization.

20422186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105368.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 20422186 is about 4519.0912803350. The cubic root of 20422186 is about 273.3384594848.

Adding to 20422186 its reverse (68122402), we get a palindrome (88544588).

The spelling of 20422186 in words is "twenty million, four hundred twenty-two thousand, one hundred eighty-six".