20385822 has 64 divisors (see below), whose sum is σ = 46414080. Its totient is φ = 5930496.

The previous prime is 20385791. The next prime is 20385823. The reversal of 20385822 is 22858302.

It is a self number, because there is not a number n which added to its sum of digits gives 20385822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20385823) 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 31 ways as a sum of consecutive naturals, for example, 129768 + ... + 129924.

It is an arithmetic number, because the mean of its divisors is an integer number (725220).

Almost surely, 2^20385822 is an apocalyptic number.

20385822 is an abundant number, since it is smaller than the sum of its proper divisors (26028258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20385822 is a wasteful number, since it uses less digits than its factorization.

20385822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 20385822 is about 4515.0661124728. The cubic root of 20385822 is about 273.1761264685.

The spelling of 20385822 in words is "twenty million, three hundred eighty-five thousand, eight hundred twenty-two".