20392844 has 6 divisors (see below), whose sum is σ = 35687484. Its totient is φ = 10196420.

The previous prime is 20392831. The next prime is 20392847. The reversal of 20392844 is 44829302.

It is a self number, because there is not a number n which added to its sum of digits gives 20392844.

It is not an unprimeable number, because it can be changed into a prime (20392847) 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 as a sum of consecutive naturals, namely, 2549102 + ... + 2549109.

It is an arithmetic number, because the mean of its divisors is an integer number (5947914).

Almost surely, 2^20392844 is an apocalyptic number.

It is an amenable number.

20392844 is a deficient number, since it is larger than the sum of its proper divisors (15294640).

20392844 is a wasteful number, since it uses less digits than its factorization.

20392844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5098215 (or 5098213 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 20392844 is about 4515.8436642559. The cubic root of 20392844 is about 273.2074885029.

The spelling of 20392844 in words is "twenty million, three hundred ninety-two thousand, eight hundred forty-four".