20422807 has 4 divisors (see below), whose sum is σ = 20897800. Its totient is φ = 19947816.

The previous prime is 20422783. The next prime is 20422811. The reversal of 20422807 is 70822402.

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

It is a cyclic number.

It is not a de Polignac number, because 20422807 - 2¹¹ = 20420759 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 (20422817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237432 + ... + 237517.

It is an arithmetic number, because the mean of its divisors is an integer number (5224450).

Almost surely, 2^20422807 is an apocalyptic number.

20422807 is a deficient number, since it is larger than the sum of its proper divisors (474993).

20422807 is an equidigital number, since it uses as much as digits as its factorization.

20422807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474992.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 20422807 is about 4519.1599883164. The cubic root of 20422807 is about 273.3412300250.

The spelling of 20422807 in words is "twenty million, four hundred twenty-two thousand, eight hundred seven".