20422663 has 4 divisors (see below), whose sum is σ = 21497560. Its totient is φ = 19347768.

The previous prime is 20422657. The next prime is 20422669. The reversal of 20422663 is 36622402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36622402 = 2 ⋅18311201.

It is an interprime number because it is at equal distance from previous prime (20422657) and next prime (20422669).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20422663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537420 + ... + 537457.

It is an arithmetic number, because the mean of its divisors is an integer number (5374390).

Almost surely, 2^20422663 is an apocalyptic number.

20422663 is a deficient number, since it is larger than the sum of its proper divisors (1074897).

20422663 is a wasteful number, since it uses less digits than its factorization.

20422663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074896.

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

The square root of 20422663 is about 4519.1440561239. The cubic root of 20422663 is about 273.3405875859.

The spelling of 20422663 in words is "twenty million, four hundred twenty-two thousand, six hundred sixty-three".