20422636 has 18 divisors (see below), whose sum is σ = 38701572. Its totient is φ = 9425520.

The previous prime is 20422613. The next prime is 20422637. The reversal of 20422636 is 63622402.

It is a happy number.

It is a super-2 number, since 2×20422636² = 834168122376992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20422636.

It is not an unprimeable number, because it can be changed into a prime (20422637) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 14430 + ... + 15781.

Almost surely, 2^20422636 is an apocalyptic number.

20422636 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20422636 is a deficient number, since it is larger than the sum of its proper divisors (18278936).

20422636 is a wasteful number, since it uses less digits than its factorization.

20422636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30241 (or 30226 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 20422636 is about 4519.1410688316. The cubic root of 20422636 is about 273.3404671282.

The spelling of 20422636 in words is "twenty million, four hundred twenty-two thousand, six hundred thirty-six".